int array_search(var $arrayname, string $value[, int $flags])

•Checks to see if $value (a string) is in the array $arrayname

•Returns the first index into the array that equals $value or returns -1 if $value is not found in the array

•$flags (optional)

•1 - case-sensitive search (else performs a case-insensitive search)

•This function is supported only in CSE HTML Validator v12.0030 and later.