Search_replace

//https://stackoverflow.com/questions/8163746/how-to-replace-certain-parts-of-my-string
$find       = ['a','b','c','z','y','x'];
        $replace    = ['z','y','x','a','b','c'];

        echo str_replace($find,$replace,'abczyx');
        //Expected output: zyxabc
        //Actual output:   abcabc