UPGRADING.INTERNALS

PHP 8.3 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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* zend_class_entry now possesses a default_object_handlers field, which
  provides a default object handler when create_object() is not overriding it.

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2. Build system changes
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3. Module changes
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 a. ext/json
   - A new function php_json_validate_ex has been added to check if the
     provided C string is valid for the given depth and options.
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4. OpCode changes
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5. SAPI changes
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