GC_Customize_Image_Control

class GC_Customize_Image_Control extends GC_Customize_Upload_Control {
	/**
	 * Control type.
	 *
	 * @since 3.4.0
	 * @var string
	 */
	public $type = 'image';

	/**
	 * Media control mime type.
	 *
	 * @since 4.1.0
	 * @var string
	 */
	public $mime_type = 'image';

	/**
	 * @since 3.4.2
	 * @deprecated 4.1.0
	 */
	public function prepare_control() {}

	/**
	 * @since 3.4.0
	 * @deprecated 4.1.0
	 *
	 * @param string $id
	 * @param string $label
	 * @param mixed  $callback
	 */
	public function add_tab( $id, $label, $callback ) {
		_deprecated_function( __METHOD__, '4.1.0' );
	}

	/**
	 * @since 3.4.0
	 * @deprecated 4.1.0
	 *
	 * @param string $id
	 */
	public function remove_tab( $id ) {
		_deprecated_function( __METHOD__, '4.1.0' );
	}

	/**
	 * @since 3.4.0
	 * @deprecated 4.1.0
	 *
	 * @param string $url
	 * @param string $thumbnail_url
	 */
	public function print_tab_image( $url, $thumbnail_url = null ) {
		_deprecated_function( __METHOD__, '4.1.0' );
	}
}

/**
 * Validation: image
 * Control: text, GC_Customize_Image_Control
 *
 * @uses    gc_check_filetype()        https://docs.gechiui.com/functions/gc_check_filetype/
 * @uses    in_array()                http://php.net/manual/en/function.in-array.php
 */
function ic_sanitize_image( $file, $setting ) {

	$mimes = array(
		'jpg|jpeg|jpe' => 'image/jpeg',
		'gif'          => 'image/gif',
		'png'          => 'image/png',
		'bmp'          => 'image/bmp',
		'tif|tiff'     => 'image/tiff',
		'ico'          => 'image/x-icon'
	);

	//check file type from file name
	$file_ext = gc_check_filetype( $file, $mimes );

	//if file has a valid mime type return it, otherwise return default
	return ( $file_ext['ext'] ? $file : $setting->default );
}