functions.php | Limit Image Upload Size

Limit Image Upload Size

//// INSTRUCTIONS: 
//// Copy and paste the code snippet below into the child theme's functions.php file.
//// You can edit the functions.php file from your WordPress dashboard (Appearance > Theme Editor) or via FTP.

//// NOTES:
//// Adjust each instance of "600" (i.e. 600KB) value as desired.
//// Adjust each instance of "600KB" for a cosmetic-only reference that matches your actual file size limit.

---------------------------CODE SNIPPET IS BELOW THIS LINE---------------------------------------------------------

// LIMIT IMAGE UPLOAD SIZE
function max_image_size( $file ) {
  $size = $file['size'];
  $size = $size / 600;
  $type = $file['type'];
  $is_image = strpos( $type, 'image' ) !== false;
  $limit = 600;  
  $limit_output = '600KB';
  if ( $is_image && $size > $limit ) {
    $file['error'] = 'Image files must be smaller than ' . $limit_output;
  }//end if
  return $file;
}//end max_image_size()
add_filter( 'wp_handle_upload_prefilter', 'max_image_size' );