original_string: function utf8_strtrunc($str, $len) {
  		$i = $len - 1;
  		if (ord($str{$i}) & 0x80) { // part of a multibyte sequence
  			for (; $i > 0 && !(ord($str{$i}) & 0x40); $i--) {
  				// find the first byte
  				;
  			}
  			if ($i <= 0) {
  				return '';
  			} // sanity check
  			for ($bc = 0, $mbs = ord($str{$i}); $mbs & 0x80; $mbs = $mbs << 1) {
  				// calculate number of bytes
  				$bc++;
  			}
  			if ($bc + $i > $len) {
  				return substr($str, 0, $i);
  			}
  			// fallthru: multibyte char fits into length
  		}
  		return substr($str, 0, $len);
  	}
code: function utf8_strtrunc($str, $len) {
  		$i = $len - 1;
  		if (ord($str{$i}) & 0x80) { // part of a multibyte sequence
  			for (; $i > 0 && !(ord($str{$i}) & 0x40); $i--) {
  				// find the first byte
  				;
  			}
  			if ($i <= 0) {
  				return '';
  			} // sanity check
  			for ($bc = 0, $mbs = ord($str{$i}); $mbs & 0x80; $mbs = $mbs << 1) {
  				// calculate number of bytes
  				$bc++;
  			}
  			if ($bc + $i > $len) {
  				return substr($str, 0, $i);
  			}
  			// fallthru: multibyte char fits into length
  		}
  		return substr($str, 0, $len);
  	}
code_tokens: function utf8_strtrunc ( $ str , $ len ) { $ i = $ len - 1 ; if ( ord ( $ str { $ i } ) & 0x80 ) { // part of a multibyte sequence for ( ; $ i > 0 && ! ( ord ( $ str { $ i } ) & 0x40 ) ; $ i -- ) { // find the first byte ; } if ( $ i <= 0 ) { return '' ; } // sanity check for ( $ bc = 0 , $ mbs = ord ( $ str { $ i } ) ; $ mbs & 0x80 ; $ mbs = $ mbs << 1 ) { // calculate number of bytes $ bc ++ ; } if ( $ bc + $ i > $ len ) { return substr ( $ str , 0 , $ i ) ; } // fallthru: multibyte char fits into length } return substr ( $ str , 0 , $ len ) ; }
docstring: Truncates a string in UTF-8 short at a given byte length.
  
  @param	string		UTF-8 multibyte character string
  @param	integer		the byte length
  @return	string		the shortened string
  @see mb_strcut()
  @author	Martin Kutschker <martin.t.kutschker@blackbox.net>
docstring_tokens: Truncates a string in UTF - 8 short at a given byte length .