apply_filters( 'kses_allowed_protocols', string[] $protocols )

Filters the list of protocols allowed in HTML attributes.

Contents

Parameters
Source
Related
- Used By
Changelog
User Contributed Notes

Parameters

$protocols string[]: Array of allowed protocols e.g. 'http', 'ftp', 'tel', and more.

Source

File: wp-includes/functions.php. View all references

$protocols = array_unique( (array) apply_filters( 'kses_allowed_protocols', $protocols ) );

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Used By

Used By
Used By	Description
wp_allowed_protocols() wp-includes/functions.php	Retrieves a list of protocols to allow in HTML attributes.

Changelog

Changelog
Version	Description
3.0.0	Introduced.

User Contributed Notes

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Contributed by Mayo Moriyama — 6 years ago
Allow Skype call links.
```
add_filter( 'kses_allowed_protocols', function ( $protocols ) {
    $protocols[] = 'skype';
    return $protocols;
} );
```
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Contributed by hatul — 9 years ago
The filter should to run before init.

Note: this example only works in PHP 5.3+
```
function wpse_allow_sms_protocol( $protocols ) {
    $protocols[] = 'sms';
    return $protocols;
}
add_action('plugins_loaded', function(){add_filter('kses_allowed_protocols', 'wpse_allow_sms_protocol' );});
print_r(wp_allowed_protocols());
```
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