$myString = 'Hello Bob how are you?';
if (strpos($myString, 'Bob') !== false) {
echo "My string contains Bob";
}
$a = 'How are you?';
if (strpos($a, 'are') !== false) {
echo 'true';
}
if (strpos($haystack,$needle) !== false) {
echo "$haystack contains $needle";
}