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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 |
|---|---|
| 5314 | $pagelinkedfrom = $args[0]; |
| 5315 | $pagelinkedto = $args[1]; |
| 5316 | |
| 5317 | $title = ''; |
| 5318 | |
| 5319 | $pagelinkedfrom = str_replace('&', '&', $pagelinkedfrom); |
| 5320 | $pagelinkedto = str_replace('&', '&', $pagelinkedto); |
| 5321 | $pagelinkedto = str_replace('&', '&', $pagelinkedto); |
| 5322 | |
| 5323 | $pagelinkedfrom = apply_filters( 'pingback_ping_source_uri', $pagelinkedfrom, $pagelinkedto ); |
| 5324 | if ( ! $pagelinkedfrom ) |
| 5325 | return $this->pingback_error( 0, __( 'A valid URL was not provided.' ) ); |
| 5326 | |
| 5327 | // Check if the page linked to is in our site |
| 5328 | $pos1 = strpos($pagelinkedto, str_replace(array('http://www.','http://','https://www.','https://'), '', get_option('home'))); |
| 5329 | if ( !$pos1 ) |
| 5330 | return $this->pingback_error( 0, __( 'Is there no link to us?' ) ); |
| 5331 | |
| 5332 | // let's find which post is linked to |