php中big5轉(zhuǎn)utf8亂碼的解決辦法：首先生成tab文件，并生成時要保證tab文件不存在；然后將指定頁面轉(zhuǎn)碼測試；接著打印出文字庫；最后big5轉(zhuǎn)【utf-8】即可。

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php中big5轉(zhuǎn)utf8亂碼的解決辦法：

第一步：生成tab文件,生成時要保證tab文件不存在才可以

writebig5UnicodeFile();

第二步：指定頁面轉(zhuǎn)碼測試

testCode();

第三步：打印出文字庫

printfCode();

 $unicode) {
        $h = floor($big5/256);
        $l = $big5%256;
        $index = ($h-135)*256*3+$l*3;
          if($index<$min) {
            $min = $index;
        }
          if($max<$index) {
            $max = $index;
        }
          if($unicode>$max_unicode) {
            $max_unicode = $unicode;
        }
          $h_1 = floor($unicode/65536);
        $h_2 = floor($unicode/256);
        $h_3 = $unicode%256;
          $big5_unicod_content[$index] = chr($h_1).chr($h_2).chr($h_3);
    }
  for($i=0;$i<=$max;$i=$i+3) {
        if(!isset($big5_unicod_content[$i])) {
            $big5_unicod_content[$i] = chr(0).chr(0).chr(0);
        }
    }
  for($i=0;$i<=$max;$i=$i+3) {
        if(strlen($big5_unicod_content[$i]) == 3) {
            putContent($big5_unicod_content[$i]);
        }else{
            die('error');
        }
    }
}
 
//測試編輯結(jié)果
function testCode() {
    $content = file_get_contents( './temlate_2.html');
    echo b2u($content);
}
 
//打印出編碼庫文字
function printfCode() {
    $fp = fopen( './big5-unicode-new.tab', 'r' );
    $len = filesize('./big5-unicode-new.tab');
    $x = 0;
    $outstr = array();
    //     fseek( $fp, 21000 - 900 + 42*3);
    for($i=$x=0;$i<$len;$i=$i+3) {
        $uni = fread( $fp, 3 );
        $codenum = ord($uni[0])*65536 + ord($uni[1])*256 + ord($uni[2]);
        if($codenum == 0) {
            $outstr[$x++] = ' ';
        }elseif( $codenum < 0x80 ) {
            $outstr[$x++] = chr($codenum);
        }elseif($codenum < 0x800) {
            $outstr[$x++] = chr( 192 + $codenum / 64 );
            $outstr[$x++] = chr( 128 + $codenum % 64 );
 
        }elseif($codenum < 0x10000){
            $outstr[$x++] = chr( 224 + floor($codenum / 4096 ));
            $codenum = $codenum%4096;
            $outstr[$x++] = chr( 128 + floor($codenum / 64 ));
            $outstr[$x++] = chr( 128 + ($codenum % 64) );
        }else{
            $outstr[$x++] = chr( 240 + floor($codenum / 262144 ));
            $codenum = $codenum%262144;
            $outstr[$x++] = chr( 128 + floor($codenum / 4096 ));
            $codenum = $codenum%4096;
            $outstr[$x++] = chr( 128 + ($codenum / 64) );
            $outstr[$x++] = chr( 128 + ($codenum % 64) );
        }
    }
 
    echo join( '', $outstr);
}
 
//big5 轉(zhuǎn) utf-8
function b2u( $instr ) {
    $fp = fopen( './big5-unicode-new.tab', 'r' );
    $len = strlen($instr);
    $outstr = '';
    for( $i = $x = 0 ; $i < $len ; $i++ ) {
        $h = ord($instr[$i]);
        if( $h >= 135 ) {
            $l = ord($instr[$i+1]);
                  fseek( $fp, ($h-135)*256*3+$l*3 );
            $uni = fread( $fp, 3 );
                  $codenum = ord($uni[0])*65536 + ord($uni[1])*256 + ord($uni[2]);
                  if($codenum == 0) {
                $outstr[$x++] = ' ';
            }elseif( $codenum < 0x80 ) {
                $outstr[$x++] = chr($codenum);
            }elseif($codenum < 0x800) {
                $outstr[$x++] = chr( 192 + $codenum / 64 );
                $outstr[$x++] = chr( 128 + $codenum % 64 );
                      }elseif($codenum < 0x10000){
                $outstr[$x++] = chr( 224 + floor($codenum / 4096 ));
                $codenum = $codenum%4096;
                $outstr[$x++] = chr( 128 + floor($codenum / 64 ));
                $outstr[$x++] = chr( 128 + ($codenum % 64) );
            }else{
                $outstr[$x++] = chr( 240 + floor($codenum / 262144 ));
                $codenum = $codenum%262144;
                $outstr[$x++] = chr( 128 + floor($codenum / 4096 ));
                $codenum = $codenum%4096;
                $outstr[$x++] = chr( 128 + ($codenum / 64) );
                $outstr[$x++] = chr( 128 + ($codenum % 64) );
            }
            $i++;
        }
        else
            $outstr[$x++] = $instr[$i];
    }
    fclose($fp);
    if( $instr != '' )
        return join( '', $outstr);
}