How to add and remove backslashes before quotation marks in PHP

In order to prevent injection or overflow, the PHP program automatically adds a backslash "" in front of double quotes, single quotes, backslashes, and NULL through the PHP instruction magic_quotes_gpc.

The default PHP command magic_quotes_gpc is on, that is, it is turned on. At this time, you can use the stripslashes() function to remove the automatically added backslashes.

Usage:

stripslashes($str)

The output result is to remove the backslash.

If the local PHP command magic_quotes_gpc is off, if this function is used, the normal backslashes will be removed.

The solution is to use the function get_magic_quotes_gpc() to detect. If it is in the open state, then the backslash is removed. If it is in the closed state, the backslash is not removed.

The program code is as follows:

$str=$_POST["str"];//读取str的内容赋值给$str变量
if(get_magic_quotes_gpc())//如果get_magic_quotes_gpc()是打开的
{
$str=stripslashes($str);//将字符串进行处理
}

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