WPJM: Limit file upload size

functions.php

<?php

function limit_upload_size_limit_for_non_admin( $limit ) {
  if ( ! current_user_can( 'manage_options' ) ) {
    $limit = 1000000; // 1mb in bytes
  }
  return $limit;
}
 
add_filter( 'upload_size_limit', 'limit_upload_size_limit_for_non_admin' );
 
 
function apply_wp_handle_upload_prefilter( $file ) {
  if ( ! current_user_can( 'manage_options' ) ) {
    $limit = 1000000; // 1mb in bytes
    if ( $file['size'] > $limit ) {
      $file['error'] = __( 'Maximum filesize is 1mb', 'wp-job-manager' );
    }
  }
  return $file;
}
 
add_filter( 'wp_handle_upload_prefilter', 'apply_wp_handle_upload_prefilter' );

?>

Came to say the same. This is the exact level of computer science knowledge you can expect from Wordpress plugin developers. Also number and string mix for no reason and lack of a better filer so they act on the whole Wordpress upload system. Terrible and sad.