Re: [RFC] Add is_assoc_array() function

On 2/20/26 20:35, Muhammed Arshid KV wrote:

Hi internals, I’ve proposed a small RFC to add *is_assoc_array(array $array):* bool to the PHP core. RFC: https://wiki.php.net/rfc/is_assoc_array The function detects associative arrays using internal storage *(HT_IS_PACKED)*. Similar helpers exist in frameworks, and a native version would be faster and more consistent. No BC breaks. No impact on SAPIs or OPcache. Feedback welcome. Thanks, Muhammed Arshid

Your implementation is pretty much the inverse of zend_array_is_list(),[^1] so you could probably simplify it with the following (note the negation operator (!) in front of zend_array_is_list(array).

    PHP_FUNCTION(is_assoc_array)
    {
        HashTable *array;

        ZEND_PARSE_PARAMETERS_START(1, 1)
            Z_PARAM_ARRAY_HT(array)
        ZEND_PARSE_PARAMETERS_END();

        RETURN_BOOL(!zend_array_is_list(array));
    }

For the sake of consistency, I would change the name of the function to array_is_assoc(). Cheers, Ben [^1]: https://github.com/php/php-src/blob/da6d890e00d56fd0d842e844aeac03baf7e47f17/Zend/zend_hash.h#L1602-L1633

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