php cobntaints code example

Example 1: php chech if string contains

$a = 'How are you?';

if (strpos($a, 'are') !== false) {
    echo 'true';
}

Example 2: php needle haystack

//Find the position of the first occurrence of a substring in a string
$mystring = 'abc';
$findme   = 'a';
$pos = strpos($mystring, $findme);