preg_match() fails with string containing slashes

Question

I have a function like this:

function in_array_r($item , $array){
        return preg_match(\'/\"\'.$item.\'\"/i\' , json_encode($array));
}

an

Answer 1

This is because the slash in your input: blah / blah / something is seen as delimiter for the regex.

To solve this you can escape your input with preg_quote(), e.g.

function in_array_r($item , $array){
    return preg_match('/"'. preg_quote($item, "/") .'"/i' , json_encode($array));
}