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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 |
|---|---|
| 674 | * |
| 675 | * The filter is only evaluated if fopen is enabled on the server. |
| 676 | * |
| 677 | * @since 3.1.0 |
| 678 | * |
| 679 | * @param string $image_url Current image URL. |
| 680 | * @param string $attachment_id Attachment ID. |
| 681 | * @param string $size Size of the image. |
| 682 | */ |
| 683 | $filepath = apply_filters( 'load_image_to_edit_attachmenturl', wp_get_attachment_url( $attachment_id ), $attachment_id, $size ); |
| 684 | } |
| 685 | |
| 686 | /** |
| 687 | * Filters the returned path or URL of the current image. |
| 688 | * |
| 689 | * @since 2.9.0 |
| 690 | * |
| 691 | * @param string|bool $filepath File path or URL to current image, or false. |
| 692 | * @param string $attachment_id Attachment ID. |