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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 |
|---|---|
| 585 | |
| 586 | if ( ! current_user_can( 'edit_theme_options' ) || ! isset( $_POST['attachment_id'] ) ) { |
| 587 | exit; |
| 588 | } |
| 589 | |
| 590 | $attachment_id = absint( $_POST['attachment_id'] ); |
| 591 | |
| 592 | $sizes = array_keys( |
| 593 | /** This filter is documented in wp-admin/includes/media.php */ |
| 594 | apply_filters( |
| 595 | 'image_size_names_choose', |
| 596 | array( |
| 597 | 'thumbnail' => __( 'Thumbnail' ), |
| 598 | 'medium' => __( 'Medium' ), |
| 599 | 'large' => __( 'Large' ), |
| 600 | 'full' => __( 'Full Size' ), |
| 601 | ) |
| 602 | ) |
| 603 | ); |