php中utf-8转unicodepublic function utf8_unicode($str) { $unicode = array(); $values = array(); $lookingFor = 1; for ($i = 0; $i < strlen( $str ); $i++ ) { $thisValue = ord( $str[ $i ] ); if ( $thisValue < ord('A') ) { // exclude 0-9 if ($thisValue >= ord('0') && $thisValue <= ord('9')) { // number $unicode[] = chr($thisValue); } else { $unicode[] = '%'.dechex($thisValue); } } else { if ( $thisValue < 128) { $unicode[] = $str[ $i ]; } else { if ( count( $values ) == 0 ) { $lookingFor = ( $thisValue < 224 ) ? 2 : 3; } $values[] = $thisValue; if ( count( $values ) == $lookingFor ) { $number = ( $lookingFor == 3 ) ? ( ( $values[0] % 16 ) * 4096 ) + ( ( $values[1] % 64 ) * 64 ) + ( $values[2] % 64 ): ( ( $values[0] % 32 ) * 64 ) + ( $values[1] % 64 ); $number = dechex($number); $unicode[] = (strlen($number)==3)?"\u0".$number:"\u".$number; $values = array(); $lookingFor = 1; } // if } // if } } // for return implode("",$unicode);}
参考文章：http://randomchaos.com/documents/?source=php_and_unicode