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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 |
|---|---|
| 636 | |
| 637 | if ( ! current_user_can( 'edit_theme_options' ) || ! isset( $_POST['attachment_id'] ) ) { |
| 638 | exit; |
| 639 | } |
| 640 | |
| 641 | $attachment_id = absint( $_POST['attachment_id'] ); |
| 642 | |
| 643 | $sizes = array_keys( |
| 644 | /** This filter is documented in wp-admin/includes/media.php */ |
| 645 | apply_filters( |
| 646 | 'image_size_names_choose', |
| 647 | array( |
| 648 | 'thumbnail' => __( 'Thumbnail' ), |
| 649 | 'medium' => __( 'Medium' ), |
| 650 | 'large' => __( 'Large' ), |
| 651 | 'full' => __( 'Full Size' ), |
| 652 | ) |
| 653 | ) |
| 654 | ); |