简繁转换的程序_PHP
PHP代码:--------------------------------------------------------------------------------
/**
*中速版,中等内存使用,使用于一般需求或有大量重复字的大段文本
*@text:待转换的字符串
*@table_file:转换映射表文件名
*/
function encode_trans1($text,$table_file='gb2big5') {
$fp = fopen($table_file.'.table', "r");
$cache = array();
$max=strlen($text)-1;
for($i=0;$i $h=ord($text[$i]);
if($h>=160) {
$l=ord($text[$i+1]);
if($h==161 && $l==64) {
$text[$i]=" ";
} else{
$cut = substr($text,$i,2);
if(!$cache[$cut]) {
fseek($fp,($h-160)*510+($l-1)*2);
$cache[$cut] = fread($fp,2);
}
$text[$i] = $cache[$cut][0];
$text[++$i] = $cache[$cut][1];
}
}
}
fclose($fp);
return $text;
}
/**
*低速版,最低内存使用,使用于少量字符时
*@text:待转换的字符串
*@table_file:转换映射表文件名
*/
function encode_trans2($text,$table_file='gb2big5') {
$fp = fopen($table_file.'.table', "r");
$max=strlen($text)-1;
for($i=0;$i $h=ord($text[$i]);
if($h>=160) {
$l=ord($text[$i+1]);
if($h==161 && $l==64) {
$gb=" ";
}else{
fseek($fp,($h-160)*510+($l-1)*2);
$gb=fread($fp,2);
}
$text[$i]=$gb[0];
$text[$i+1]=$gb[1]; $i++;
}
}
fclose($fp);
return $text;
}
/**
*高速版,最高内存使用,使用于大段文本时
*@text:待转换的字符串
*@table_file:转换映射表文件名
*/
function encode_trans3($text,$table_file='gb2big5') {
$fp = fopen($table_file.'.table', "r");
$str = fread($fp,strlen($table_file.'.table'));
fclose($fp);
$max=strlen($text)-1;
for($i=0;$i $h=ord($text[$i]);
if($h>=160) {
$l=ord($text[$i+1]);
if($h==161 && $l==64) {
$text[$i]=' ';
$text[++$i]=' ';
}else{
$pos = ($h-160)*510+($l-1)*2;
$text[$i]=$str[$pos];
$text[++$i]=$str[$pos+1];
}
}
}
return $text;
}
?>
--------------------------------------------------------------------------------

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