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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 |
|---|---|
| 6172 | |
| 6173 | /** |
| 6174 | * Filter the pingback source URI. |
| 6175 | * |
| 6176 | * @since 3.6.0 |
| 6177 | * |
| 6178 | * @param string $pagelinkedfrom URI of the page linked from. |
| 6179 | * @param string $pagelinkedto URI of the page linked to. |
| 6180 | */ |
| 6181 | $pagelinkedfrom = apply_filters( 'pingback_ping_source_uri', $pagelinkedfrom, $pagelinkedto ); |
| 6182 | |
| 6183 | if ( ! $pagelinkedfrom ) |
| 6184 | return $this->pingback_error( 0, __( 'A valid URL was not provided.' ) ); |
| 6185 | |
| 6186 | // Check if the page linked to is in our site |
| 6187 | $pos1 = strpos($pagelinkedto, str_replace(array('http://www.','http://','https://www.','https://'), '', get_option('home'))); |
| 6188 | if ( !$pos1 ) |
| 6189 | return $this->pingback_error( 0, __( 'Is there no link to us?' ) ); |
| 6190 | |