Use of PHP functions related to HTML and filtering links in WordPress

This article describes how to parse the Html function and the function used to filter links in WordPress, including the esc_html () function and the esc_url () function. For more information, see Esc_html () (escape Html)
The esc_html () function is used to escape Html code so that Html code is not escaped.

Usage

esc_html( $text );

Parameters

$ Text

(String) (required) the string to be escaped.

Default value: None

Return value

(String) returns the escape character.

Example

echo esc_html( 'A link' );

The above code will be output:

WordPress function: esc_html () (escape Html)

(To prevent browser transcoding, I cut a picture directly)

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This function is located in: wp-includes/formatting. php

Esc_url () (filter link)
Many URLs have small errors. Using the esc_url () function can block or correct these errors and reject insecure protocols.

Work content of the esc_url () function:

The default DENY is not the URL of the following protocol: defaulting to http, https, ftp, ftps, mailto, news, irc, gopher, nntp, feed, and telnet.
Delete invalid and dangerous characters
Convert characters into HTML entity characters
Usage

esc_url( $url, $protocols, $_context );

Parameters

$ Url

(String) (required) the URL to be filtered.

Default value: None

$ Protocols

(Array) (optional) an array that can receive protocols. If no protocol is set, the default value is: defaulting to http, https, ftp, ftps, mailto, news, irc, gopher, nntp, feed, and telnet.

Default value: None

$ _ Context

(String) (optional) how to return a URL.

Default value: (string) display

Return value

(String) returns the filtered link.

Example

<? Php echo esc_url ('www .endskin.com '); // output: http://www.endskin.com?>

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This function is located in: wp-includes/formatting. php