/**
  * @covers Patchwork\Utf8::strpos
  * @covers Patchwork\Utf8::stripos
  * @covers Patchwork\Utf8::strrpos
  * @covers Patchwork\Utf8::strripos
  */
 function testStrpos()
 {
     $this->assertSame(false, u::strpos('abc', ''));
     $this->assertSame(false, u::strpos('abc', 'd'));
     $this->assertSame(false, u::strpos('abc', 'a', 3));
     $this->assertSame(0, u::strpos('abc', 'a', -1));
     $this->assertSame(1, u::strpos('한국어', '국'));
     $this->assertSame(3, u::stripos('DÉJÀ', 'à'));
     $this->assertSame(1, u::stripos('aςσb', 'ΣΣ'));
     $this->assertSame(false, u::strrpos('한국어', ''));
     $this->assertSame(1, u::strrpos('한국어', '국'));
     $this->assertSame(3, u::strripos('DÉJÀ', 'à'));
     $this->assertSame(1, u::strripos('aςσb', 'ΣΣ'));
     $this->assertSame(16, u::stripos('der Straße nach Paris', 'Paris'));
 }
/**
 * Finds position of first occurrence of a string within another, case insensitive.
 * @param string $haystack				The string from which to get the position of the first occurrence.
 * @param string $needle				The string to be found.
 * @param int $offset					The position in $haystack to start searching from. If it is omitted, searching starts from the beginning.
 * @param string $encoding (optional)	The used internally by this function character encoding. If it is omitted, the platform character set will be used by default.
 * @return mixed						Returns the numeric position of the first occurrence of $needle in the $haystack, or FALSE if $needle is not found.
 * Note: The first character's position is 0, the second character position is 1, and so on.
 * This function is aimed at replacing the functions stripos() and mb_stripos() for human-language strings.
 * @link http://php.net/manual/en/function.stripos
 * @link http://php.net/manual/en/function.mb-stripos
 */
function api_stripos($haystack, $needle, $offset = 0, $encoding = null)
{
    return Utf8::stripos($haystack, $needle, $offset);
}