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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 |
|---|---|
| 116 | * Get all available templates for the post/page attributes meta-box. |
| 117 | * The "Default template" array element should only be added if the array is |
| 118 | * not empty so we do not trigger the template select element without any options |
| 119 | * besides the default value. |
| 120 | */ |
| 121 | $available_templates = wp_get_theme()->get_page_templates( get_post( $post->ID ) ); |
| 122 | $available_templates = ! empty( $available_templates ) ? array_merge( |
| 123 | array( |
| 124 | /** This filter is documented in wp-admin/includes/meta-boxes.php */ |
| 125 | '' => apply_filters( 'default_page_template_title', __( 'Default template' ), 'rest-api' ), |
| 126 | ), |
| 127 | $available_templates |
| 128 | ) : $available_templates; |
| 129 | |
| 130 | // Lock settings. |
| 131 | $user_id = wp_check_post_lock( $post->ID ); |
| 132 | if ( $user_id ) { |
| 133 | $locked = false; |
| 134 | |