代码示例:(标识:demo_php_func_string_md5_3)
<!DOCTYPE html>
<html>
<body>

<?php
$str = "Shanghai";
echo md5($str);

if (md5($str) == "5466ee572bcbc75830d044e66ab429bc")
  {
  echo "<br>I love Shanghai!";
  exit;
  }
?>
  
</body>
</html>
运行结果: