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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 |
|---|---|
| 667 | } |
| 668 | |
| 669 | /** |
| 670 | * Filter whether to enable in-source media discovery in Press This. |
| 671 | * |
| 672 | * @since 4.2.0 |
| 673 | * |
| 674 | * @param bool $enable Whether to enable media discovery. |
| 675 | */ |
| 676 | if ( apply_filters( 'enable_press_this_media_discovery', true ) ) { |
| 677 | /* |
| 678 | * If no title, _images, _embed, and _meta was passed via $_POST, fetch data from source as fallback, |
| 679 | * making PT fully backward compatible with the older bookmarklet. |
| 680 | */ |
| 681 | if ( empty( $_POST ) && ! empty( $data['u'] ) ) { |
| 682 | $data = $this->source_data_fetch_fallback( $data['u'], $data ); |
| 683 | } else { |
| 684 | foreach ( array( '_images', '_embeds' ) as $type ) { |
| 685 | if ( empty( $_POST[ $type ] ) ) { |