String Contains

function str_startsWith($haystack, $needle) {
  return strpos($haystack, $needle) === 0;
}
 
function str_endsWith($haystack, $needle){
    return strrpos($haystack, $needle) === strlen($haystack)-strlen($needle);
}
 
function str_contains($haystack, $needle) {
  return strpos($haystack, $needle) !== false;
}