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PHP 8.0 INTERNALS UPGRADE NOTES
1. Internal API changes
a. Object Handlers API
b. ZEND_OVERLOADED_FUNCTION and corresponding call_method() object handler
c. TSRM changes
d. get() and set() object handlers
e. zend_parse_parameters 'L' specifier
f. Arginfo argument types
g. zend_free_op type and should_free argument of zend_get_zval_ptr()
h. zend_value_error()
i. get_closure() object handler
j. compare_objects() and compare() object handlers
2. Build system changes
a. Abstract
b. Unix build system changes
c. Windows build system changes
3. Module changes
========================
1. Internal API changes
========================
a. Object Handlers API and some related functions, e.g. zend_call_method() and
zend_objects_clone_obj() were changed to receive zend_object* instead of
zval* and zend_string* instead of zval* for property names.
b. ZEND_OVERLOADED_FUNCTION and corresponding call_method() object handler
were removed. ZEND_INTERNAL_FUNCTION with ZEND_ACC_CALL_VIA_HANDLER and
defined "handler" callback should be used instead. This "handler" callback
should also take care about function cleanup. See ext/zend_test/test.c
for example.
c. The following things have been removed from TSRM:
- TSRMLS_DC
- TSRMLS_D
- TSRMLS_CC
- TSRMLS_C
- TSRMLS_FETCH
- TSRMLS_FETCH_FROM_CTX
- TSRMLS_SET_CTX
- tsrm_new_interpreter_context
- tsrm_set_interpreter_context
- tsrm_free_interpreter_context
- support for GNUPTH, SGI ST, and BETHREADS
d. The get() and set() object handlers have been removed. The get() handler
can generally be replaced with cast_object(). Some uses of set() may be
replaced by do_operation(). If set() was used to overload direct
assignments using "=", then this is no longer supported and the
functionality should be provided in some other way (for example, as
modification of an object property).
e. The zend_parse_parameters 'L' specifier and the Z_PARAM_STRICT_LONG()
family of macros have been removed. Use 'l' and Z_PARAM_LONG() instead,
which, despite the confusing name, actually have stricter input validation.
f. Arginfo argument types for internal functions are no longer checked.
Instead type checks should be performed using the zend_parse_parameters()
or ZEND_PARSE_PARAMETERS_*() APIs.
g. zend_free_op type and "should_free" argument of zend_get_zval_ptr() were
removed. It's possible to get the old "should_free" value using the
following code.
zval *ret = zend_get_zval_ptr(opline, opline->op1_type, &opline->op1,
execute_data, BP_VAR_R);
zval *should_free = (op_type & (IS_TMP_VAR|IS_VAR)) ? ret : NULL;
h. Added the zend_value_error() function, which is intended to be used
to raise ValueError when inappropriate argument values are passed
to functions.
i. get_closure() object handlers now accept an additional zend_bool parameter
`check_only`. If it is true, the handler is called to check whether the
object is callable; in this case the handler should not throw an exception.
j. compare_objects() handler was removed. Extensions should use compare() object
handler instead and check if both arguments are objects and have the same
compare handler, using ZEND_COMPARE_OBJECTS_FALLBACK() macro.
k. The 'I' length modifier, used to denote 32 and 64bit integer from the custom
snprintf and spprintf implementations has been removed.
Use the ZEND_LONG_FMT, ZEND_ULONG_FMT and ZEND_XLONG_FMT macros defined in
php-src/Zend/zend_long.h
The 'v' format from the custom snprintf and spprintf implementations has
been removed. Use the standard 's' format instead.
========================
2. Build system changes
========================
a. Abstract
- Symbol HAVE_HASH_EXT is removed and is no longer defined. It should be
considered to have hash extension always available since PHP 7.4.
- Symbol HAVE_PCRE is removed and is no longer defined. It should be
considered to have pcre extension always available since PHP 7.4.
- Symbol HAVE_LOCALE_H has been removed and is no longer defined.
b. Unix build system changes
1. --enable-maintainer-zts is renamed --enable-zts for parity with Windows
and as recognition that ZTS is not a "maintainer" or experimental feature.
c. Windows build system changes
========================
3. Module changes
========================
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