php find if string contains

1$myString = 'Hello Bob how are you?';
2if (strpos($myString, 'Bob') !== false) {
3    echo "My string contains Bob";
4}

1if (strpos($string, 'substring') !== false) {
2	// do stuff 
3}

1$mystring = 'abc';
2$findme   = 'a';
3$pos = strpos($mystring, $findme);

1$myString = 'Hello Bob how are you?';
2if (strpos($myString, 'Bob') !== false) {
3    echo "My string contains Bob";
4}

1// returns true if $needle is a substring of $haystack
2function contains($haystack, $needle){
3    return strpos($haystack, $needle) !== false;
4}

1phpCopy<?php
2$mystring = "This is a PHP program.";
3
4if (strpos($mystring, "program.") !== false) {
5    echo("True");
6}
7?>
8