check if a string contains a substring php

PHP
$myString = 'Hello Bob how are you?';
if (strpos($myString, 'Bob') !== false) {
    echo "My string contains Bob";
}if (strpos($string, 'substring') !== false) {
	// do stuff 
}$mystring = 'abc';
$findme   = 'a';
$pos = strpos($mystring, $findme);if (strpos($a, 'are') !== false) {
    echo 'true';
}str_contains('STRING', 'SUB_STRING');$a = 'How are you?';

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