wp-includes/widgets/class-wp-widget-media-image.php:65Get schema for properties of a widget instance (item).
array public function get_instance_schema() { return array_merge( array( 'size' => array( 'type' => 'string', 'enum' => array_merge( get_intermediate_image_sizes(), array( 'full', 'custom' ) ), 'default' => 'medium', 'description' => __( 'Size' ), ), 'width' => array( // Via 'customWidth', only when size=custom; otherwise via 'width'. 'type' => 'integer', 'minimum' => 0, 'default' => 0, 'description' => __( 'Width' ), ), 'height' => array( // Via 'customHeight', only when size=custom; otherwise via 'height'. 'type' => 'integer', 'minimum' => 0, 'default' => 0, 'description' => __( 'Height' ), ), 'caption' => array( 'type' => 'string', 'default' => '', 'sanitize_callback' => 'wp_kses_post', 'description' => __( 'Caption' ), 'should_preview_update' => false, ), 'alt' => array( 'type' => 'string', 'default' => '', 'sanitize_callback' => 'sanitize_text_field', 'description' => __( 'Alternative Text' ), ), 'link_type' => array( 'type' => 'string', 'enum' => array( 'none', 'file', 'post', 'custom' ), 'default' => 'custom', 'media_prop' => 'link', 'description' => __( 'Link To' ), 'should_preview_update' => true, ), 'link_url' => array( 'type' => 'string', 'default' => '', 'format' => 'uri', 'media_prop' => 'linkUrl', 'description' => __( 'URL' ), 'should_preview_update' => true, ), 'image_classes' => array( 'type' => 'string', 'default' => '', 'sanitize_callback' => array( $this, 'sanitize_token_list' ), 'media_prop' => 'extraClasses', 'description' => __( 'Image CSS Class' ), 'should_preview_update' => false, ), 'link_classes' => array( 'type' => 'string', 'default' => '', 'sanitize_callback' => array( $this, 'sanitize_token_list' ), 'media_prop' => 'linkClassName', 'should_preview_update' => false, 'description' => __( 'Link CSS Class' ), ), 'link_rel' => array( 'type' => 'string', 'default' => '', 'sanitize_callback' => array( $this, 'sanitize_token_list' ), 'media_prop' => 'linkRel', 'description' => __( 'Link Rel' ), 'should_preview_update' => false, ), 'link_target_blank' => array( 'type' => 'boolean', 'default' => false, 'media_prop' => 'linkTargetBlank', 'description' => __( 'Open link in a new tab' ),Introduced in 4.8.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/widgets/class-wp-widget-media-image.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.