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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 |
---|---|
4906 | $protocols = array( 'http', 'https', 'ftp', 'ftps', 'mailto', 'news', 'irc', 'gopher', 'nntp', 'feed', 'telnet', 'mms', 'rtsp', 'svn', 'tel', 'fax', 'xmpp', 'webcal' ); |
4907 |
|
4908 | /** |
4909 | * Filters the list of protocols allowed in HTML attributes. |
4910 | * |
4911 | * @since 3.0.0 |
4912 | * |
4913 | * @param array $protocols Array of allowed protocols e.g. 'http', 'ftp', 'tel', and more. |
4914 | */ |
4915 | $protocols = apply_filters( 'kses_allowed_protocols', $protocols ); |
4916 | } |
4917 |
|
4918 | return $protocols; |
4919 | } |
4920 |
|
4921 | /** |
4922 | * Return a comma-separated string of functions that have been called to get |
4923 | * to the current point in code. |
4924 | * |