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<?php
 require_once(dirname(__FILE__).'/unicode.class.php');
 header('Content-type: text/html; charset=UTF-8');
 
 $big_endian = true;
 
 // Original Text
 $text = 'Simple text with 滝 japanese character';
 
 // UTF-8 to UTF-16 and UTF-16 to UTF-8
 $text_utf16 = unicode::utf8_to_utf16($text, $big_endian);
 $text_utf8 = unicode::utf16_to_utf8($text_utf16, $big_endian);
 if ($text !== $text_utf8) {
 echo 'Error while converting between UTF-8 and UTF-16';
 exit(1);
 }
 
 // UTF-8 to UTF-32 and UTF-32 to UTF-8
 $text_utf32 = unicode::utf8_to_utf32($text, $big_endian);
 $text_utf8 = unicode::utf32_to_utf8($text_utf32, $big_endian);
 if ($text !== $text_utf8) {
 echo 'Error while converting between UTF-8 and UTF-32';
 exit(1);
 }
 
 // UTF-16 to UTF-32 and UTF-32 to UTF-16
 $text = $text_utf16;
 $text_utf32 = unicode::utf16_to_utf32($text, $big_endian, $big_endian);
 $text_utf16 = unicode::utf32_to_utf16($text_utf32, $big_endian, $big_endian);
 if ($text !== $text_utf16) {
 echo 'Error while converting between UTF-16 and UTF-32';
 exit(1);
 }
 
 echo 'OK';
 exit(0);
 
 
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