Question

I’ve been looking for a way to check if any of an array of values exists in a string, but it seems that PHP has no native way of doing this, so I’ve come up with the below.

My question – is there a better way of doing this, as this seems pretty inefficient? Thanks.

$match_found = false;
$referer = wp_get_referer();
$valid_referers = array(
    'dd-options',
    'dd-options-footer',
    'dd-options-offices'
);

/** Loop through all referers looking for a match */
foreach($valid_referers as $string) :

    $referer_valid = strstr($referer, $string);
    if($referer_valid !== false) :
        $match_found = true;
        continue;
    endif;

endforeach;

/** If there were no matches, exit the function */
if(!$match_found) :
    return false;
endif;

Answer 1

Try with following function:

function contains($input, array $referers)
{
    foreach($referers as $referer) {
        if (stripos($input,$referer) !== false) {
            return true;
        }
    }
    return false;
}

if ( contains($referer, $valid_referers) ) {
  // contains
}