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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 |
---|---|
6765 |
|
6766 | /** |
6767 | * Filters the pingback source URI. |
6768 | * |
6769 | * @since 3.6.0 |
6770 | * |
6771 | * @param string $pagelinkedfrom URI of the page linked from. |
6772 | * @param string $pagelinkedto URI of the page linked to. |
6773 | */ |
6774 | $pagelinkedfrom = apply_filters( 'pingback_ping_source_uri', $pagelinkedfrom, $pagelinkedto ); |
6775 |
|
6776 | if ( ! $pagelinkedfrom ) { |
6777 | return $this->pingback_error( 0, __( 'A valid URL was not provided.' ) ); |
6778 | } |
6779 |
|
6780 | // Check if the page linked to is in our site |
6781 | $pos1 = strpos( $pagelinkedto, str_replace( array( 'http://www.', 'http://', 'https://www.', 'https://' ), '', get_option( 'home' ) ) ); |
6782 | if ( ! $pos1 ) { |
6783 | return $this->pingback_error( 0, __( 'Is there no link to us?' ) ); |