How to implement string escape in php?

In PHP, you can use the addslashes() function to achieve string escaping; the addslashes() function can add a backslash before the specified predefined character, the syntax format is "addslashes(string)", parameters string specifies the string to be escaped and returns the escaped string.

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The escape character is a special character constant. The escape character starts with a backslash "\" and is followed by one or more characters. Escape characters have specific meanings that are different from the original meaning of the characters, so they are called "escape" characters.

Uses of escape characters:

1: Convert ordinary characters to special uses, such as back key, enter key, etc.

2: Used to convert special meaning characters back to their original meaning.

3: Before data is written to the database, escape characters (functions) will be used to escape some sensitive characters. Avoid website injection attacks.

Then during the PHP development project, we may encounter operations that require escaping a large amount of data. How to escape the string? Let me introduce it to you below.

In PHP, you can use the addslashes() function to achieve string escaping. Below we will introduce how to escape strings in PHP through a simple code example.

<?php
$str = "[&#39;name&#39;=>&#39;张三&#39;,&#39;age&#39;=>19]";
echo $str . "<br>";
//对字符串进行转义
$a = addslashes($str);
//输出转义后的字符串
echo $a . "<br>";
?>

Output:

addslashes() function is used to add a backslash before the specified predefined character and returns the value added before the predefined character. Backslash string

addslashes(string)

• Parameter string: required, specifies the string to be escaped.

Return value: Returns the escaped string

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