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array_key_exists(PHP 4 >= 4.0.7, PHP 5, PHP 7) array_key_exists — Checks if the given key or index exists in the array Description
array_key_exists() returns Parameters
Return Values
Returns
Examples
Example #1 array_key_exists() example
<?php Example #2 array_key_exists() vs isset()
isset() does not return
<?php Notes
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