<!DOCTYPE html>
<html lang="ko">
<head>
<meta charset="UTF-8">
<title>PHP Built In Function</title>
</head>
<body>
<?php
echo strpos("ABCabcDEFabc", "abc")."<br>"; // 3
echo strrpos("ABCabcDEFabc", "abc"); // 9
?>
</body>
</html>
