PHP 8.6 INTERNALS UPGRADE NOTES

1. Internal API changes

2. Build system changes

3. Module changes

4. OpCode changes

5. SAPI changes

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1. Internal API changes
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  . ZSTR_INIT_LITERAL(), zend_string_starts_with_literal(), and
    zend_string_starts_with_literal_ci() now support strings containing NUL
    bytes. Passing non-literal char* is no longer supported.
  . The misnamed ZVAL_IS_NULL() has been removed. Use Z_ISNULL() instead.
  . New zend_class_entry.ce_flags2 and zend_function.fn_flags2 fields were
    added, given the primary flags were running out of bits.
  . The zval_is_true() alias of zend_is_true() has been removed. Call
    zend_is_true() directly instead.
  . The _zval_get_*() compatibility macros for PHP 7.2 have been removed
    call the variant without the leading underscore instead.
    Affected: _zval_get_long, _zval_get_double, _zval_get_string,
    _zval_get_long_func, _zval_get_double_func, _zval_get_string_func
  . CHECK_ZVAL_NULL_PATH() and CHECK_NULL_PATH() have been removed, use
    zend_str_has_nul_byte(Z_STR_P(...)) and zend_char_has_nul_byte()
    respectively.
  . ZEND_LTOA() (and ZEND_LTOA_BUF_LEN) has been removed, as it was
    unsafe. Directly use ZEND_LONG_FMT with a function from the
    printf family.
  . The zval_dtor() alias of zval_ptr_dtor_nogc() has been removed.
    Call zval_ptr_dtor_nogc() directly instead.
  . The internal zend_copy_parameters_array() function is no longer exposed.
  . The zend_make_callable() function has been removed, if a callable zval
    needs to be obtained use the zend_get_callable_zval_from_fcc() function
    instead. If this was used to store a callable, then an FCC should be
    stored instead.
  . The zend_active_function{_ex}() functions now return a const zend_function
    pointer.

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2. Build system changes
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3. Module changes
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4. OpCode changes
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5. SAPI changes
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