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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 |
---|---|
723 | * @since 2.7.0 |
724 | * |
725 | * @param object $post |
726 | * @param bool|string $check |
727 | * @return array |
728 | */ |
729 | function image_size_input_fields( $post, $check = '' ) { |
730 |
|
731 | // get a list of the actual pixel dimensions of each possible intermediate version of this image |
732 | $size_names = apply_filters( 'image_size_names_choose', array('thumbnail' => __('Thumbnail'), 'medium' => __('Medium'), 'large' => __('Large'), 'full' => __('Full Size')) ); |
733 |
|
734 | if ( empty($check) ) |
735 | $check = get_user_setting('imgsize', 'medium'); |
736 |
|
737 | foreach ( $size_names as $size => $label ) { |
738 | $downsize = image_downsize($post->ID, $size); |
739 | $checked = ''; |
740 |
|
741 | // is this size selectable? |