Limit Image Upload Size

Building Better MyListing Websites. One Code Snippet at a Time.


The Limit Image Upload Size code snippet helps preserve the performance and disk storage of a MyListing website.

If image governance is not performed, users can upload massive image sizes, so we recommend that you put this snippet in place before you launch your website.

This code snippet limits the max file upload size to 600kb and this is what your users will see/experience on the front-end when adding or editing a Listing.

Check out our Image Optimization for MyListing Websites guide for more information.


Snippet Type: PHP

  1. Grab the code snippet.
  2. Follow the instructions.
  3. Adjust as desired.
  4. Save your changes.
					//// INSTRUCTIONS: 
//// Use a plugin like WPCodeBox to add this code snippet to your website.
//// WPCodeBox Guide and Discount: 🔥 🔥

//// 1. Adjust the '512' value as desired.
//// 2. Adjust the '512kb' value to match the value of the previous value.

//// NOTES: 
//// '1024' is the equivalent of 1 MB.

----------------- CODE SNIPPET IS BELOW THIS LINE - REMOVE THIS LINE AND ABOVE -----------------

function max_image_size( $file ) {
  $size = $file['size'];
  $size = $size / 1024;
  $type = $file['type'];
  $is_image = strpos( $type, 'image' ) !== false;
  $limit = 512;
  $limit_output = '512kb';
  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' );

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