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array_key_first › WordPress Function
Since5.9.0
已弃用n/a
› array_key_first ( $array )
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Polyfill for array_key_first() function added in PHP 7.3.
Get the first key of the given array without affecting the internal array pointer.Related Functions: array_key_last, array_is_list, _wp_array_get, _wp_array_set, registered_meta_key_exists