Escapes scalar values deeply

mysql_real_escape_string_deep.function.php

<?php 

/**
 * Escapes scalar values deeply
 *
 * Examples:
 * <code>
 * var_export(mysql_real_escape_string_deep(1));
 * // outputs '1'
 * 
 * var_export(mysql_real_escape_string_deep("please escape ' me"));
 * // outputs 'please escape \\\' me'
 *
 * var_export(mysql_real_escape_string_deep(array(1, "please escape ' me")));
 * // outputs: array (0 => '1', 1 => 'please escape \\\' me')
 * <code>
 *
 * @author Luiz "Felds" Liscia <dev@felds.com.br>
 * @params mixed $var The variable to be escaped
 * @return mixed
 */
function mysql_real_escape_string_deep($var)
{
  if (is_scalar($var))
    $var = mysql_real_escape_string($var);

  if (is_array($var))
    foreach ($var as &$v)
      $v = mysql_real_escape_string_deep($v);

  return $var;
}