UPGRADING.INTERNALS

PHP 8.2 INTERNALS UPGRADE NOTES

1. Internal API changes

2. Build system changes

3. Module changes

4. OpCode changes

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1. Internal API changes
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* Removed zend_binary_zval_str(n)casecmp() APIs. These were thin wrappers
  around zend_binary_str(n)casecmp_l() -- rather than
  zend_binary_str(n)casecmp() as one would expect. Call the appropriate
  wrapped function directly instead.
* Removed the (ZEND_)WRONG_PARAM_COUNT_WITH_RETVAL() macros.
* php_stristr() no longer lowercases the haystack and needle as a side effect.
  Call zend_str_tolower() yourself if necessary. You no longer need to copy
  the haystack and needle before passing them to php_stristr().
* zend_register_module_ex() no longer copies the module entry.
* The main/php_stdint.h header has been removed.
  Include the standard <inttypes.h> and/or <stdint.h> headers instead.
  Replace usage of u_char by the standard C99 uint8_t type.

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2. Build system changes
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3. Module changes
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  a. ext/standard
    - The PHP APIs string_natural_compare_function_ex(),
      string_natural_case_compare_function(), and string_natural_compare_function()
      have been removed. They always returned SUCCESS and were a wrapper around
      strnatcmp_ex(). Use strnatcmp_ex() directly instead.
  b. ext/pdo
    - pdo_raise_impl_error()'s parameter sqlstate has been changed from
      const char * to pdo_error_type (aka char [6]).

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4. OpCode changes
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* The ZEND_INIT_FCALL opcode now asserts that the function exists in the symbol
  table as the function's existence is checked at compile time.
  For extensions modifying the function symbol table, setting
  CG(compiler_options) |= ZEND_COMPILE_IGNORE_USER_FUNCTIONS | ZEND_COMPILE_IGNORE_INTERNAL_FUNCTIONS;
  will produce ZEND_INIT_FCALL_BY_NAME opcodes instead which check for the
  existence of the function at runtime.