Update index.php

html/submit/index.php

@@ -51,6 +51,7 @@
 		}
  
 	    $url = mysqli_real_escape_string($link, $_POST['url']);
+	    $url = str_replace("''", "%27", $url); 
 		//$url = str_replace("\"", "\"\"", $url); //not needed if using single quotes for query
 		$url = substr($url,0,400); //don't allow user to post a longer url than 400b (also limited in form)
 		$worksafe = mysqli_real_escape_string($link, $_POST['worksafe']);