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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )
apply_filters( "hook_name", "what_to_filter" )
.Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
Line | Code |
---|---|
4436 | $protocols = array( 'http', 'https', 'ftp', 'ftps', 'mailto', 'news', 'irc', 'gopher', 'nntp', 'feed', 'telnet', 'mms', 'rtsp', 'svn', 'tel', 'fax', 'xmpp' ); |
4437 |
|
4438 | /** |
4439 | * Filter the list of protocols allowed in HTML attributes. |
4440 | * |
4441 | * @since 3.0.0 |
4442 | * |
4443 | * @param array $protocols Array of allowed protocols e.g. 'http', 'ftp', 'tel', and more. |
4444 | */ |
4445 | $protocols = apply_filters( 'kses_allowed_protocols', $protocols ); |
4446 | } |
4447 |
|
4448 | return $protocols; |
4449 | } |
4450 |
|
4451 | /** |
4452 | * Return a comma-separated string of functions that have been called to get |
4453 | * to the current point in code. |
4454 | * |