Htmlspecialchars () and Htmlspecialchars_decode ()

The Htmlspecialchars_decode () function is an inverse function of the htmlspecialchars () function.

htmlspecialchars () can be used to prevent XSS; Refer to: https://www.zhihu.com/question/27646993

Htmlspecialchars_decode () function

More examples of examples 1

To convert a predefined HTML entity to a character:

Do not convert any quotation marks?>

The HTML output of the above code is as follows (see source code):

<! DOCTYPE Html>
The browser output of the above code:
Bill & ' Steve ' Bill & ' Steve ' Bill & ' Steve '
Example 2
To convert a predefined HTML entity to double quotes:
Convert double and single quotation marks?>
The HTML output of the above code is as follows (see source code):
<! DOCTYPE html>
The browser output of the above code:
I Love "PHP".


Htmlspecialchars () function:
More examples of examples 1
Convert some of the predefined characters to HTML entities:
Do not convert any quotation marks?>
The HTML output of the above code is as follows (see source code):
<! DOCTYPE Html>
The browser output of the above code:
Bill & ' Steve ' Bill & ' Steve ' Bill & ' Steve '
Htmlspecialchars () and Htmlspecialchars_decode ()