php中addslashes()和addclashes()函数的区别分析

//向字符串中的特定字符添加反斜杠
$str = "Hello, my name is John Adams.";
echo $str;
echo addcslashes($str,'m');
echo addcslashes($str,'J');
?>

输出：

//向字符串中的预定义字符添加反斜杠
$str = "Who's John Adams?";
echo $str . " This is not safe in a database query.";
echo addslashes($str) . " This is safe in a database query.";
?>

输出：

Who's John Adams? This is not safe in a database query. Who\'s John Adams? This is safe in a database query.

对于函数addslashes()和addclashes()，都有对应的去除反斜杠的方法，分别为：stripcslashes函数和stripslashes函数。有兴趣的朋友，也可以研究下。