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e4e9cd8355
Before this change, var_export()'s output for stdClass objects calls the non-existent stdClass::__set_state method, and is therefore useless. This commit makes var_export() output an (object) cast from an array instead, which when evaluated, will produce a stdClass object. Other classes see unchanged output.
467 lines
18 KiB
Plaintext
467 lines
18 KiB
Plaintext
PHP 7.3 UPGRADE NOTES
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1. Backward Incompatible Changes
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2. New Features
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3. Changes in SAPI modules
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4. Deprecated Functionality
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5. Changed Functions
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6. New Functions
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7. New Classes and Interfaces
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8. Removed Extensions and SAPIs
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9. Other Changes to Extensions
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10. New Global Constants
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11. Changes to INI File Handling
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12. Windows Support
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13. Other Changes
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========================================
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1. Backward Incompatible Changes
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========================================
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Core:
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. The ext_skel utility has been completely redesigned with new options and
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some old options removed. This is now written in PHP and has no external
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dependencies.
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. Support for BeOS has been dropped.
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. Exceptions thrown due to automatic conversion of warnings into exceptions
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in EH_THROW mode (e.g. some DateTime exceptions) no longer populate
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error_get_last() state. As such, they now work the same way as manually
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thrown exceptions.
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. TypeError now reports wrong types as `int` and `bool` instead of `integer`
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and `boolean`.
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. Due to the introduction of flexible heredoc/nowdoc syntax (see New Features
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section), doc strings that contain the ending label inside their body may
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cause syntax errors or change in interpretation. For example in
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$str = <<<FOO
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abcdefg
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FOO
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FOO;
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the indented occurrence of "FOO" did not previously have any special
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meaning. Now it will be interpreted as the end of the heredoc string and
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the following "FOO;" will cause a syntax error. This issue can always be
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resolved by choosing an ending label that does not occur within the contents
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of the string.
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. "continue" statements targeting "switch" control flow structures will now
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generate a warning. In PHP such "continue" statements are equivalent to
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"break", while they behave as "continue 2" in other languages.
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while ($foo) {
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switch ($bar) {
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case "baz":
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continue;
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// Warning: "continue" targeting switch is equivalent to
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"break". Did you mean to use "continue 2"?
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}
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}
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. Array accesses of type $obj["123"], where $obj implements ArrayAccess and
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"123" is an integral string literal will no longer result in an implicit
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conversion to integer, i.e., $obj->offsetGet("123") will be called instead
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of $obj->offsetGet(123). This matches existing behavior for non-literals.
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The behavior of arrays is not affected in any way, they continue to
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implicitly convert integeral string keys to integers.
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. In PHP, static properties are shared between inheriting classes, unless the
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static property is explicitly overridden in a child class. However, due to
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an implementation artifact it was possible to separate the static properties
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by assigning a reference. This loophole has been fixed.
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class Test {
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public static $x = 0;
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}
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class Test2 extends Test { }
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Test2::$x = &$x;
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$x = 1;
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var_dump(Test::$x, Test2::$x);
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// Previously: int(0), int(1)
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// Now: int(1), int(1)
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. References returned by array and property accesses are now unwrapped as
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part of the access. This means that it is no longer possible to modify the
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reference between the access and the use of the accessed value:
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$arr = [1];
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$ref =& $arr[0];
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var_dump($arr[0] + ($arr[0] = 2));
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// Previously: int(4), Now: int(3)
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This makes the behavior of references and non-references consistent. Please
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note that reading and writing a value inside a single expression remains
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undefined behavior and may change again in the future.
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. Argument unpacking stopped working with Traversables with non-integer keys.
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The following code worked in PHP 7.0-7.2 by accident.
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function foo(...$args) {
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var_dump($args);
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}
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function gen() {
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yield 1.23 => 123;
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}
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foo(...gen());
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Now it generates an exception.
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BCMath:
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. All warnings thrown by BCMath functions are now using PHP's error handling.
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Formerly some warnings have directly been written to stderr.
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. bcmul() and bcpow() now return numbers with the requested scale. Formerly,
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the returned numbers may have omitted trailing decimal zeroes.
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MBString:
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. Due to added support for named captures, mb_ereg_*() patterns using named
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captures will behave differently. In particular named captures will be part
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of matches and mb_ereg_replace() will interpret additional syntax. See
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"New Features" section for more information.
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mysqli:
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. Prepared statements now properly report the fractional seconds for DATETIME/
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TIME/TIMESTAMP columns with decimals specifier (e.g. TIMESTAMP(6) when using
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microseconds). Formerly, the fractional seconds part was simply omitted from
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the returned values.
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PDO/MySQL:
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. Prepared statements now properly report the fractional seconds for DATETIME/
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TIME/TIMESTAMP columns with decimals specifier (e.g. TIMESTAMP(6) when using
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microseconds). Formerly, the fractional seconds part was simply omitted from
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the returned values.
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Please note that this only affects the usage of PDO_MYSQL with emulated
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prepares turned off (e.g. using the native preparation functionality).
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Statements using connections having PDO::ATTR_EMULATE_PREPARES=true (which
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is the default) were not affected by the bug fixed and have already been
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getting the proper fractional seconds values from the engine.
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Reflection:
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. Reflection export to string now uses `int` and `bool` instead of `integer`
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and `boolean`.
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SPL:
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. If an SPL autoloader throws an exception, following autoloaders will not be
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executed. Previously all autoloaders were executed and exceptions were
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chained.
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SimpleXML:
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. Mathematic operations involving SimpleXML objects will now treat the text as
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an integer or float, whichever is more appropriate. Previously values were
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treated as integers unconditionally.
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Standard:
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. Undefined variables passed to compact() will now be reported as a notice.
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. getimagesize() and related functions now report the mime type of BMP images
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as image/bmp instead of image/x-ms-bmp, since the former has been registered
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with the IANA (see RFC 7903).
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. stream_socket_get_name() will now return IPv6 addresses wrapped in brackets.
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For example "[::1]:1337" will be returned instead of "::1:1337".
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========================================
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2. New Features
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========================================
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Core:
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. Implemented flexible heredoc and nowdoc syntax: The closing marker for doc
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strings is no longer required to be followed by a semicolon or newline.
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Additionally the closing marker may be indented, in which case the
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indentation will be stripped from all lines in the doc string.
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(RFC: https://wiki.php.net/rfc/flexible_heredoc_nowdoc_syntaxes)
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. Array destructuring now supports reference assignments using the syntax
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[&$a, [$b, &$c]] = $d. The same is also supported for list().
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(RFC: https://wiki.php.net/rfc/list_reference_assignment)
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. instanceof now allows literals as the first operand,
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in which case the result is always FALSE.
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. A new CompileError exception has been added, from which ParseError inherits.
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A small number of compilation errors will now throw a CompileError instead
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of generating a fatal error. Currently this only affects compilation errors
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that may be thrown by token_get_all() in TOKEN_PARSE mode, but more errors
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may be converted in the future.
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BCMath:
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. bcscale() can now also be used as getter to retrieve the current scale in use.
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MBString:
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. Support for full case-mapping and case-folding has been added. Unlike simple
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case-mapping, full case-mapping may change the length of the string. For
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example:
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mb_strtoupper("Straße")
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// Produces STRAßE on PHP 7.2
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// Produces STRASSE on PHP 7.3
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The different casing mapping and folding modes are available through
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mb_convert_case():
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. MB_CASE_LOWER (used by mb_strtolower)
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. MB_CASE_UPPER (used by mb_strtoupper)
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. MB_CASE_TITLE
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. MB_CASE_FOLD
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. MB_CASE_LOWER_SIMPLE
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. MB_CASE_UPPER_SIMPLE
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. MB_CASE_TITLE_SIMPLE
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. MB_CASE_FOLD_SIMPLE (used by case-insensitive operations)
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Only unconditional, language agnostic full case-mapping is performed.
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. Case-insensitive string operations now use case-folding instead of case-
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mapping during comparisons. This means that more characters will be
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considered (case insensitively) equal now.
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. mb_convert_case() with MB_CASE_TITLE now performs title-case conversion
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based on the Cased and CaseIgnorable derived Unicode properties. In
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particular this also improves handling of quotes and apostophes.
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. Data tables have been updated for Unicode 11.
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. Mbstring now correctly supports strings larger than 2GB.
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. Performance of the mbstring extension has been significantly improved
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across the board. The largest improvements are in case conversion functions.
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. mb_ereg_*() functions now support named captures. Matching functions like
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mb_ereg() will now return named captures both using their group number and
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their name, similar to PCRE:
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mb_ereg('(?<word>\w+)', '国', $matches);
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// => [0 => "国", 1 => "国", "word" => "国"];
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Additionally, mb_ereg_replace() now supports the \k<> and \k'' notations
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to reference named captures in the replacement string:
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mb_ereg_replace('\s*(?<word>\w+)\s*', "_\k<word>_\k'word'_", ' foo ');
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// => "_foo_foo_"
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\k<> and \k'' can also be used for numbered references, which also works
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with group numbers greater than 9.
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readline:
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. Support for the completion_append_character and completion_suppress_append
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options has been added to readline_info(). These options are only available
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if PHP is linked against libreadline (rather than libedit).
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Standard:
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. The -–with-password-argon2[=dir] configure argument now provides support for
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both Argon2i and Argon2id hashes in the password_hash(), password_verify(),
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password_get_info(), and password_needs_rehash() functions. Passwords may be
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hashed and verified using the PASSWORD_ARGON2ID constant.
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Support for both Argon2i and Argon2id in the password_* functions now requires
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PHP be linked against libargon2 reference library >= 20161029.
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(RFC: https://wiki.php.net/rfc/argon2_password_hash_enhancements).
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========================================
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3. Changes in SAPI modules
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========================================
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phpdbg:
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. The unused constants PHPDBG_FILE, PHPDBG_METHOD, PHPDBG_LINENO and
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PHPDBG_FUNC have been removed.
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FPM:
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. The getallheaders function is now also available.
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========================================
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4. Deprecated Functionality
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========================================
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GD:
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. image2wbmp() has been deprecated.
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Intl:
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. Usage of the Normalizer::NONE form throws a deprecation warning, if PHP is linked with ICU >= 56.
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========================================
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5. Changed Functions
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========================================
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JSON:
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. A new flag has been added, JSON_THROW_ON_ERROR, which can be used with
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json_decode() or json_encode() and causes these functions to throw a
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JsonException upon an error, instead of setting the global error state that
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is retrieved with json_last_error(). JSON_PARTIAL_OUTPUT_ON_ERROR takes
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precedence over JSON_THROW_ON_ERROR.
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(RFC: https://wiki.php.net/rfc/json_throw_on_error)
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Standard:
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. debug_zval_dump() was changed to display recursive arrays and objects
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in the same way as var_dump(). Now, it doesn't display them twice.
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. array_push() and array_unshift() can now also be called with a single
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argument, which is particularly convenient wrt. the spread operator.
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PCRE:
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. preg_quote() now also escapes the '#' character.
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========================================
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6. New Functions
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========================================
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Core:
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. Added monotonic timer function hrtime([bool get_as_num]). It returns an
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array of the form [seconds, nanoseconds] with the timestamp starting at
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an unspecified point in the past. If the optional argument is passed as
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true, the return value is an integer on 64-bit systems or float on
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32-bit systems, representing the nanoseconds. The timestamp is not
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adjustable and is not related to wall clock or time of day. The timers
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are available under Linux, FreeBSD, Windows, Mac, SunOS, AIX and their
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derivatives. If no required timers are provided by a corresponding
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platform, the function returns false.
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Date:
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. Added the DateTime::createFromImmutable() method, which mirrors
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DateTimeImmutable::createFromMutable().
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FPM:
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. Added fpm_get_status() function which returns FPM status info array.
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GMP:
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. Added gmp_binomial(n, k) for calculating binomial coefficients.
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. Added gmp_lcm(a, b) for calculating the least common multiple.
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. Added gmp_perfect_power(a) to check if number is a perfect power.
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. Added gmp_kronecker(a, b) to compute the Kronecker symbol.
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Intl:
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. Added void Spoofchecker::setRestrictionLevel(int $level) method, available
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when linked with ICU >= 58.1. Levels are represented as class constants
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- Spoofchecker::ASCII
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- Spoofchecker::HIGHLY_RESTRICTIVE
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- Spoofchecker::MODERATELY_RESTRICTIVE
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- Spoofchecker::MINIMALLY_RESTRICTIVE
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- Spoofchecker::UNRESTRICTIVE
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- Spoofchecker::SINGLE_SCRIPT_RESTRICTIVE
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For the detailed documentation on the restriction levels, see
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URestrictionLevel under
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http://icu-project.org/apiref/icu4c/uspoof_8h.html
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. Added Normalizer::getRawDecomposition() and normalizer_get_raw_decomposition(),
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to retrieve the Decomposition_Mapping property of a character.
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OpenSSL:
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. Added openssl_pkey_derive that derives a shared secret for DH, ECDH and
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possibly other future algorithms supported by EVP_PKEY_derive.
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Sockets:
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. Added functions to import/export the WSAPROTOCOL_INFO info struct. This
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implementation complements the already supported SCM_RIGHTS as in
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man 3 cmsg and is Windows specific. For the import/export, the default
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system securities apply for the SHM reading/writing. The socket becomes
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invalid, when the last reference to it is closed.
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- socket_wsaprotocol_info_export(resource $sock, int $pid) - exports the
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WSAPROTOCOL_INFO structure into shared memory and returns an identifier
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to be used for the import, or false on failure. The exported ID is
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only valid for the dedicated PID.
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- socket_wsaprotocol_info_import(string $id) - returns a duplicated
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socket as per the passed identifier, or false on failure.
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- socket_wsaprotocol_info_release(string $id) - releases the shared memory
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corresponding to the passed identifier.
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Standard:
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. Added is_countable() function, to check whether a value may be passed to
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count().
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(RFC: https://wiki.php.net/rfc/is-countable)
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========================================
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7. New Classes and Interfaces
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========================================
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JSON:
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. JsonException
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========================================
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8. Removed Extensions and SAPIs
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========================================
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========================================
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9. Other Changes to Extensions
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========================================
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Curl:
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. libcurl >= 7.15.5 is now required.
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Filter:
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. FILTER_VALIDATE_FLOAT now also supports a `thousand` option, which
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defines the set of allowed thousand separator chars. The default (`"',."`)
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is fully backward compatible with former PHP versions.
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. FILTER_SANITIZE_ADD_SLASHES has been added as an alias of the 'magic_quotes'
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filter (FILTER_SANITIZE_MAGIC_QUOTES). The 'magic_quotes' filter is subject
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to removal in future versions of PHP.
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FTP:
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. Set default transfer mode to binary
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Intl:
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. Normalizer::NONE is deprecated, when PHP is linked with ICU >= 56
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. Introduced Normalizer::FORM_KC_CF as Normalizer::normalize() argument
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for NFKC_Casefold normalization, available when linked with ICU >= 56
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MBString:
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. The configuration option --with-libmbfl is no longer available.
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ODBC:
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. Support for ODBCRouter has been removed.
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. Support for Birdstep has been removed.
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PCRE:
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. The PCRE extension has been upgraded to PCRE2, which may cause minor
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behavioral changes, and augments the existing regular expression syntax.
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See <https://wiki.php.net/rfc/pcre2-migration> for details.
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Standard:
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. var_export() now exports stdClass objects as an array casted to an object
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(`(object) array( ... )`), rather than using the nonexistent method
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stdClass::__setState().
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ZIP:
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. Bundled libzip has been dropped,
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system library is now required.
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========================================
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10. New Global Constants
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========================================
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Curl:
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. CURLOPT_REQUEST_TARGET
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JSON:
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. JSON_THROW_ON_ERROR
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PGSQL:
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. Requires Postgres 9.3
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- PGSQL_DIAG_SCHEMA_NAME
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- PGSQL_DIAG_TABLE_NAME
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- PGSQL_DIAG_COLUMN_NAME
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- PGSQL_DIAG_DATATYPE_NAME
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- PGSQL_DIAG_CONSTRAINT_NAME
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. Requires Postgres 9.6
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- PGSQL_DIAG_SEVERITY_NONLOCALIZED
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Standard:
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. PASSWORD_ARGON2ID
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========================================
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11. Changes to INI File Handling
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========================================
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- birdstep.max_links
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||
. This INI directive has been removed.
|
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- opcache.inherited_hack
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. This INI directive has been removed. The value has already been ignored
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since PHP 5.3.0.
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- syslog.facility
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- New INI to set syslog facility which specifies what type of program is
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logging the message. It is used only when error_log is set to syslog.
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- syslog.ident
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||
. New INI to set syslog ident string which is prepended to every message. It
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is used only when error_log is set syslog.
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||
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========================================
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12. Windows Support
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========================================
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- Core
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. File descriptors are opened in shared read/write/delete mode by default.
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This effectively maps the UNIX semantics and allows to delete files with
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handles in use. It is not 100% same, some platform differences still
|
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persist. After the deletion, the filename entry is blocked, until all
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the opened handles to it are closed.
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||
========================================
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13. Other Changes
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||
========================================
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||
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