how to check a string contains a substring in php code example

Example 1: php find if substring is in string

$result = strpos("haystack", "needle");

if ($result != false)
{
  // text found
}

Example 2: php check if string contains

// returns true if $needle is a substring of $haystack
function contains($haystack, $needle){
    return strpos($haystack, $needle) !== false;
}