add enctype='multipart/form-data' if form has a file input

Author: k1sul1

classes/class-cpt-wplf-form.php

@@ -422,9 +422,16 @@ function wplf_form( $id , $content = '', $xclass = '' ) {
         // you can override the content via a parameter
         $content = get_post( $id )->post_content;
       }
+
+      $multipart = "";
+      // check if form contains file inputs
+      if(strpos($content, "type='file'") > -1 || strpos($content, "type=\"file\"") > -1){
+        $multipart = "enctype='multipart/form-data'";
+      }
+
       ob_start();
 ?>
-<form class="libre-form libre-form-<?php echo $id . ' ' . $xclass; ?>">
+<form class="libre-form libre-form-<?php echo $id . ' ' . $xclass; ?>" <?php echo $multipart; ?>>
   <?php echo apply_filters( 'wplf_form', $content ); ?>
   <input type="hidden" name="referrer" value="<?php the_permalink(); ?>">
   <input type="hidden" name="_form_id" value="<?php esc_attr_e( $id ); ?>">