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277 lines
11 KiB
Plaintext
277 lines
11 KiB
Plaintext
PHP 8.0 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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14. Performance Improvements
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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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. Methods with the same name as the class are no longer interpreted as
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constructors. The __construct() method should be used instead.
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. Removed ability to call non-static methods statically.
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. Removed (unset) cast.
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. Removed track_errors ini directive. This means that $php_errormsg is no
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longer available. The error_get_last() function may be used instead.
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. Removed the ability to define case-insensitive constants. The third
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argument to define() may no longer be true.
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. Access to undefined constants now always results in an Error exception.
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Previously, unqualified constant accesses resulted in a warning and were
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interpreted as strings.
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. Removed ability to specify an autoloader using an __autoload() function.
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spl_autoload_register() should be used instead.
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. Removed the $errcontext argument for custom error handlers.
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. Removed create_function(). Anonymous functions may be used instead.
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. Removed each(). foreach or ArrayIterator should be used instead.
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. Removed ability to unbind $this from closures that were created from a
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method, using Closure::fromCallable() or ReflectionMethod::getClosure().
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. Any array that has a number n as its first numeric key will use n+1 for
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its next implicit key. Even if n is negative.
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RFC: https://wiki.php.net/rfc/negative_array_index
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. The default error_reporting level is now E_ALL. Previously it excluded
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E_NOTICE and E_DEPRECATED.
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. display_startup_errors is now enabled by default.
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. The @ operator will no longer silence fatal errors (E_ERROR, E_CORE_ERROR,
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E_COMPILE_ERROR, E_USER_ERROR, E_RECOVERABLE_ERROR, E_PARSE). Error handlers
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that expect error_reporting to be 0 when @ is used, should be adjusted to
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use a mask check instead:
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// Replace
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function my_error_handler($err_no, $err_msg, $filename, $linenum) {
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if (error_reporting() == 0) {
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return; // Silenced
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}
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// ...
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}
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// With
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function my_error_handler($err_no, $err_msg, $filename, $linenum) {
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if (!(error_reporting() & $err_no)) {
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return; // Silenced
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}
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// ...
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}
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Additionally, care should be taken that error messages are not displayed in
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production environments, which can result in information leaks. Please
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ensure that display_errors=Off is used in conjunction with error logging.
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. Inheritance errors due to incompatible method signatures (LSP violations)
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will now always generate a fatal error. Previously a warning was generated
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in some cases.
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RFC: https://wiki.php.net/rfc/lsp_errors
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. The precedence of the concatenation operator has changed relative to
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bitshifts and addition as well as subtraction.
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RFC: https://wiki.php.net/rfc/concatenation_precedence
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- COM:
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. Removed the ability to import case-insensitive constants from type
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libraries. The second argument to com_load_typelib() may no longer be false;
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com.autoregister_casesensitive may no longer be disabled; case-insensitive
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markers in com.typelib_file are ignored.
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- Date:
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. mktime() and gmmktime() now require at least one argument. time() can be
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used to get the current timestamp.
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- Exif:
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. Removed read_exif_data(). exif_read_data() should be used instead.
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- Filter:
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. The FILTER_FLAG_SCHEME_REQUIRED and FILTER_FLAG_HOST_REQUIRED flags for the
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FILTER_VALIDATE_URL filter have been removed. The scheme and host are (and
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have been) always required.
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. The INPUT_REQUEST and INPUT_SESSION source for filter_input() etc have been
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removed. These were never implemented and their use always generated a
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warning.
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- GD:
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. The deprecated function image2wbmp() has been removed.
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RFC: https://wiki.php.net/rfc/image2wbmp
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. The deprecated functions png2wbmp() and jpeg2wbmp() have been removed.
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RFC: https://wiki.php.net/rfc/deprecate-png-jpeg-2wbmp
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. The default $mode parameter of imagecropauto() no longer accepts -1.
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IMG_CROP_DEFAULT should be used instead.
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- GMP:
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. gmp_random() has been removed. One of gmp_random_range() or
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gmp_random_bits() should be used instead.
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- Intl:
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. The deprecated constant INTL_IDNA_VARIANT_2003 has been removed.
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RFC: https://wiki.php.net/rfc/deprecate-and-remove-intl_idna_variant_2003
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. The deprecated Normalizer::NONE constant has been removed.
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- LDAP:
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. The deprecated function ldap_sort has been removed.
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- Mbstring:
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. The mbstring.func_overload directive has been removed. The related
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MB_OVERLOAD_MAIL, MB_OVERLOAD_STRING, and MB_OVERLOAD_REGEX constants have
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also been removed. Finally, the "func_overload" and "func_overload_list"
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entries in mb_get_info() have been removed.
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. mb_parse_str() can no longer be used without specifying a result array.
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. A number of deprecated mbregex aliases have been removed. See the following
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list for which functions should be used instead:
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* mbregex_encoding() -> mb_regex_encoding()
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* mbereg() -> mb_ereg()
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* mberegi() -> mb_eregi()
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* mbereg_replace() -> mb_ereg_replace()
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* mberegi_replace() -> mb_eregi_replace()
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* mbsplit() -> mb_split()
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* mbereg_match() -> mb_ereg_match()
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* mbereg_search() -> mb_ereg_search()
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* mbereg_search_pos() -> mb_ereg_search_pos()
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* mbereg_search_regs() -> mb_ereg_search_regs()
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* mbereg_search_init() -> mb_ereg_search_init()
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* mbereg_search_getregs() -> mb_ereg_search_getregs()
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* mbereg_search_getpos() -> mb_ereg_search_getpos()
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* mbereg_search_setpos() -> mb_ereg_search_setpos()
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. The 'e' modifier for mb_ereg_replace() has been removed.
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mb_ereg_replace_callback() should be used instead.
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. A non-string pattern argument to mb_ereg_replace() will now be interpreted
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as a string instead of an ASCII codepoint. The previous behavior may be
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restored with an explicit call to chr().
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- PCRE:
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. When passing invalid escape sequences they are no longer intepreted as
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literals. This behaviour previously required the X modifier - which is
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now ignored.
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- PDO:
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. The method PDOStatement::setFetchMode() now accepts the following signature:
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PDOStatement::setFetchMode($mode, $classname, $params)
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- PDO_ODBC:
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. The php.ini directive pdo_odbc.db2_instance_name has been removed
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- Reflection:
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. The method signatures
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ReflectionClass::newInstance($args)
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ReflectionFunction::invoke($args)
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ReflectionMethod::invoke($object, $args)
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have been changed to:
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ReflectionClass::newInstance(...$args)
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ReflectionFunction::invoke(...$args)
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ReflectionMethod::invoke($object, ...$args)
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Code that must be compatible with both PHP 7 and PHP 8 can use the following
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signatures to be compatible with both versions:
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ReflectionClass::newInstance($arg = null, ...$args)
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ReflectionFunction::invoke($arg = null, ...$args)
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ReflectionMethod::invoke($object, $arg = null, ...$args)
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- Socket:
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. The deprecated AI_IDN_ALLOW_UNASSIGNED and AI_IDN_USE_STD3_ASCII_RULES
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flags for socket_addrinfo_lookup() have been removed.
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- SPL:
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. SplFileObject::fgetss() has been removed.
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. SplHeap::compare($a, $b) now specifies a method signature. Inheriting
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classes implementing this method will now have to use a compatible
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method signature.
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- Standard:
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. assert() will no longer evaluate string arguments, instead they will be
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treated like any other argument. assert($a == $b) should be used instead of
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assert('$a == $b'). The assert.quiet_eval ini directive and
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ASSERT_QUIET_EVAL constants have also been removed, as they would no longer
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have any effect.
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. parse_str() can no longer be used without specifying a result array.
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. fgetss() has been removed.
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. The string.strip_tags filter has been removed.
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. The needle argument of strpos(), strrpos(), stripos(), strripos(), strstr(),
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strchr(), strrchr(), and stristr() will now always be interpreted as a
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string. Previously non-string needles were interpreted as an ASCII code
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point. An explicit call to chr() can be used to restore the previous
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behavior.
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. The needle argument for strpos(), strrpos(), stripos(), strripos(), strstr() and stristr() can now be empty.
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. The 'salt' option of password_hash() is no longer supported. If the 'salt'
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option is used a warning is generated, the provided salt is ignored, and a
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generated salt is used instead.
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. The quotemeta() function will now return an empty string if an empty string
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was passed. Previously false was returned.
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- XML:
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. xml_parser_create(_ns) will now return an XmlParser object rather than a
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resource. Return value checks using is_resource() should be replaced with
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checks for `false`. The xml_parser_free() function no longer has an effect,
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instead the XmlParser instance is automatically destroyed if it is no longer
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referenced.
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- Zlib:
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. gzgetss() has been removed.
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========================================
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2. New Features
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========================================
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========================================
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3. Changes in SAPI modules
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========================================
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========================================
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4. Deprecated Functionality
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========================================
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========================================
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5. Changed Functions
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========================================
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========================================
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6. New Functions
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========================================
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========================================
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7. New Classes and Interfaces
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========================================
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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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========================================
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10. New Global Constants
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========================================
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========================================
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11. Changes to INI File Handling
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========================================
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========================================
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12. Windows Support
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========================================
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========================================
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13. Other Changes
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========================================
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========================================
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14. Performance Improvements
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========================================
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