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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 |
---|---|
593 |
|
594 | if ( ! current_user_can( 'edit_theme_options' ) || ! isset( $_POST['attachment_id'] ) ) { |
595 | exit; |
596 | } |
597 |
|
598 | $attachment_id = absint( $_POST['attachment_id'] ); |
599 |
|
600 | $sizes = array_keys( |
601 | /** This filter is documented in wp-admin/includes/media.php */ |
602 | apply_filters( |
603 | 'image_size_names_choose', |
604 | array( |
605 | 'thumbnail' => __( 'Thumbnail' ), |
606 | 'medium' => __( 'Medium' ), |
607 | 'large' => __( 'Large' ), |
608 | 'full' => __( 'Full Size' ), |
609 | ) |
610 | ) |
611 | ); |