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121 lines
4.5 KiB
Plaintext
121 lines
4.5 KiB
Plaintext
$Id$
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UPGRADE NOTES - PHP X.Y
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1. Internal API changes
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a. Executor changes
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b. Streams pooling API
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c. Lowercasing and locales
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d. zend_qsort_r
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e. get_current_key
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2. Build system changes
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a. Unix build system changes
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b. Windows build system changes
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========================
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1. Internal API changes
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========================
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a. Executor changes
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* extensions can't override zend_execute() any more, they should override
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zend_execute_ex() instead. The EG(current_execute_data) is already
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initialized in zend_execute_ex(), so for compatibility extensions
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may need to use EG(current_execute_data)->prev_execute_data instead.
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* removed EG(arg_types_stack), EX(fbc), EX(called_scope), EX(current_object)
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* added op_array->nested_calls. It's calculated at compile time.
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* added EX(call_slots). It is an array to store information about syntaticaly
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nested calls (e.g. foo(bar())). It's preallocated together with execute_data.
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* added EX(call) - pointer to a current calling function. Actually an
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element of EX(call_slots)
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* opcodes INIT_METHOD_CALL, ZEND_INIT_STATIC_METHOD_CALL,
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ZEND_INIT_FCALL_BY_NAME, ZEND_INIT_NS_FCALL_BY_NAME use result.num as
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an index in EX(call_slots)
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* opcode ZEND_NEW uses extended_vallue as an index in EX(call_slots)
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* opcoes ZEND_DO_FCALL and ZEND_DO_FCALL_BY_NAME use op2.num as
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an index in EX(call_slots)
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* added op_array->used_stack. It's calculated at compile time and the
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corresponding stack space is preallocated together with execute_data.
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ZEND_SEND* and ZEND_DO_FCALL* don't need to check for stack overflow
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anymore.
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* Removed execute_data->Ts field. The VM temporary variables always allocated
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immediately before execute_data structure. Now they are accessed by offset
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from the execute_data base pointer (instead of execute_data->Ts). Compiler
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stores new offsets in op_array->opcodes[*].op?.num. You can use macros
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EX_TMP_VAR() and EX_TMP_VAR_NUM() to access temp_variable by offset or
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number. You can convert number to offset using EX_TMP_VAR_NUM(0, num) or
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offset to number (EX_TMP_VAR_NUM(0,0)-EX_TMP_VAR(0,offset)).
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* Removed execute_data->CVs field. The VM compiled variables always allocated
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immediately after execute_data structure. Now they are accessed by offset
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from the execute_data base pointer (instead of execute_data->CVs). You can
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use macros EX_CV_NUM() to access compiled variables by number.
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b. Streams pooling API
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The streams pooling API has been removed. The following functions no longer
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exist:
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PHPAPI int php_stream_context_get_link(php_stream_context *context,
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const char *hostent, php_stream **stream);
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PHPAPI int php_stream_context_set_link(php_stream_context *context,
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const char *hostent, php_stream *stream);
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PHPAPI int php_stream_context_del_link(php_stream_context *context,
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php_stream *stream);
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c. Lowercasing and locales
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The lowercasing functions in zend_operators.c were split into those that do
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lowercasing according to locale rules and those that do ASCII lowercasing.
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ASCII:
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zend_str_tolower_copy
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zend_str_tolower_dup
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zend_str_tolower
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zend_binary_strcasecmp
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zend_binary_strncasecmp
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Locale-based:
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zend_binary_strncasecmp_l
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zend_binary_strcasecmp_l
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zend_binary_zval_strcasecmp
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zend_binary_zval_strncasecmp
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string_compare_function_ex
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string_case_compare_function
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Internal engine lowercasing will be using ASCII-only rules. User-facing functions,
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such as strcasecmp, will be using locale rules.
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Two new functions - zend_binary_strncasecmp_l and zend_binary_strcasecmp_l - added as
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locale-based counterparts to zend_binary_strcasecmp and zend_binary_strncasecmp.
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d. zend_qsort_r
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Added the function zend_qsort_r():
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typedef int (*compare_r_func_t)(const void *, const void * TSRMLS_DC, void *);
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void zend_qsort_r(void *base, size_t nmemb, size_t siz, compare_r_func_t compare, void *arg TSRMLS_DC);
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The extra argument it has (relatively to zend_qsort()) is passed to the
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comparison function.
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e. get_current_key
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The signature of the get_current_key iteration handler has been changed to:
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void (*get_current_key)(zend_object_iterator *iter, zval *key TSRMLS_DC);
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The key should be written into the zval* using the ZVAL_* macros.
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========================
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2. Build system changes
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========================
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a. Unix build system changes
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-
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b. Windows build system changes
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- Drop Windows XP and 2003 support.
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