[RFC] Deprecate is_a() and is_subclass_of() with string when not allowed - #23236
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DanielEScherzer wants to merge 1 commit into
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[RFC] Deprecate is_a() and is_subclass_of() with string when not allowed#23236DanielEScherzer wants to merge 1 commit into
is_a() and is_subclass_of() with string when not allowed#23236DanielEScherzer wants to merge 1 commit into
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NickSdot
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Aug 12, 2026
…allowed For `is_a()` and `is_subclass_of()`, emit deprecation warnings when calling with a string as the first argument but with `$allow_string` being false. The two functions share implementation code and so are updated together. https://wiki.php.net/rfc/deprecations_php_8_6
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is_a()andis_subclass_of(), emit deprecation warnings when calling with a string as the first argument but with$allow_stringbeing false. The two functions share implementation code and so are updated together.https://wiki.php.net/rfc/deprecations_php_8_6