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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 |
|---|---|
| 546 | * |
| 547 | * The filter is only evaluated if fopen is enabled on the server. |
| 548 | * |
| 549 | * @since 3.1.0 |
| 550 | * |
| 551 | * @param string $image_url Current image URL. |
| 552 | * @param string $attachment_id Attachment ID. |
| 553 | * @param string $size Size of the image. |
| 554 | */ |
| 555 | $filepath = apply_filters( 'load_image_to_edit_attachmenturl', wp_get_attachment_url( $attachment_id ), $attachment_id, $size ); |
| 556 | } |
| 557 | |
| 558 | /** |
| 559 | * Filter the returned path or URL of the current image. |
| 560 | * |
| 561 | * @since 2.9.0 |
| 562 | * |
| 563 | * @param string|bool $filepath File path or URL to current image, or false. |
| 564 | * @param string $attachment_id Attachment ID. |