/**
  * UTF-8 aware alternative to stristr()
  *
  * Returns all of haystack from the first occurrence of needle to the end. Needle and haystack are examined in a case-insensitive manner to
  * find the first occurrence of a string using case insensitive comparison.
  *
  * @param   string  $str     The haystack
  * @param   string  $search  The needle
  *
  * @return string the sub string
  *
  * @see     http://www.php.net/stristr
  * @since   1.3.0
  */
 public static function stristr($str, $search)
 {
     return utf8_stristr($str, $search);
 }

 /**
  * UTF-8 aware alternative to stristr
  * Returns all of haystack from the first occurrence of needle to the end.
  * needle and haystack are examined in a case-insensitive manner
  * Find first occurrence of a string using case insensitive comparison
  *
  * @param   string  $str     The haystack
  * @param   string  $search  The needle
  *
  * @return string the sub string
  *
  * @see     http://www.php.net/stristr
  * @since   11.1
  */
 public static function stristr($str, $search)
 {
     jimport('phputf8.stristr');
     return utf8_stristr($str, $search);
 }

 function testLinefeedBoth()
 {
     $str = "iñtërn\nâtiônàlizætiøn";
     $search = "N\nÂT";
     $this->assertEqual(utf8_stristr($str, $search), "n\nâtiônàlizætiøn");
 }

 /**
  * UTF-8 aware alternative to stristr
  * Returns all of haystack from the first occurrence of needle to the end.
  * needle and haystack are examined in a case-insensitive manner
  * Find first occurrence of a string using case insensitive comparison
  *
  * @param   string  $str     The haystack
  * @param   string  $search  The needle
  *
  * @return string the sub string
  *
  * @see     http://www.php.net/stristr
  * @since   2.0
  */
 public static function stristr($str, $search)
 {
     if (!function_exists('utf8_stristr')) {
         require_once __DIR__ . '/phputf8/stristr.php';
     }
     return utf8_stristr($str, $search);
 }

 /**
  * UTF-8 aware alternative to stristr
  * Returns all of haystack from the first occurrence of needle to the end.
  * needle and haystack are examined in a case-insensitive manner
  * Find first occurrence of a string using case insensitive comparison
  *
  * @param   string  $str     The haystack
  * @param   string  $search  The needle
  *
  * @return string the sub string
  *
  * @see     http://www.php.net/stristr
  * @since   1.0
  */
 public static function stristr($str, $search)
 {
     require_once __DIR__ . '/phputf8/stristr.php';
     return utf8_stristr($str, $search);
 }