php实现utf-8转unicode函数代码实例

作者：袖梨 2022-06-24

对于这种问题，我们还是直接上代码来的快，大伙拿去直接用吧，不要谢我。

 代码如下 复制代码
public 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);
}

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