public function test_str_between()
 {
     $string = Str::between('*****@*****.**', '@', '.');
     $this->assertEquals('example', $string);
     $string = Str::between('user@example@.org', '@', '.');
     $this->assertEquals('example@', $string);
     $string = Str::between('u.ser@example@.org', '@', '.');
     $this->assertEquals('example@', $string);
     $string = Str::between('userexample.org', '@', '.');
     $this->assertEquals('', $string);
     $string = Str::between('', '@', '.');
     $this->assertEquals('', $string);
 }
 /**
  * Get the substring between the given start and end.
  *
  * @param string $string
  * @param string $start
  * @param string $end
  *
  * @return string
  */
 function str_between($string, $start = '', $end = '')
 {
     return Str::between($string, $start, $end);
 }