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function is not described

stripos() WP 1.0

For php4 compatibility

No Hooks.

Return

null. Nothing.

Usage

stripos( $haystack, $needle );
$haystack (required)
-
$needle (required)
-

Code of stripos() WP 5.8

<?php
function stripos($haystack, $needle){
    return strpos($haystack, stristr( $haystack, $needle ));
}