Hướng dẫn php escape special characters

[PHP 4, PHP 5, PHP 7, PHP 8]

Nội dung chính

• Description
• Return Values
• What is escaping special characters in PHP?
• How do I allow special characters in PHP?
• What is the use of Htmlspecialchars in PHP?
• What is the difference between Htmlentities and Htmlspecialchars in PHP?

addslashes — Quote string with slashes

Description

addslashes[string $string]: string

• single quote [']
• double quote ["]
• backslash [\]
• NUL [the NUL byte]

A use case of addslashes[] is escaping the aforementioned characters in a string that is to be evaluated by PHP:


if you need to quote SQL strings it's