PHP实现中文到拼音转换的高效编码方案

=‘5.0‘) ? array_combine($_TDataKey, $_TDataValue) : _Array_Combine($_TDataKey, $_TDataValue);
arsort($_Data);
reset($_Data);
if($_Code != ‘gb2312‘) $_String = _U2_Utf8_Gb($_String);
$_Res = ‘‘;
for($i=0; $i160) { $_Q = ord(substr($_String, ++$i, 1)); $_P = $_P*256 + $_Q - 65536; }
$_Res .= _Pinyin($_P, $_Data);
}
return preg_replace("/[^a-z0-9]*/", ‘‘, $_Res);
}
function _Pinyin($_Num, $_Data)
{
if ($_Num>0 && $_Num<160 ) return chr($_Num);
elseif($_Num<-20319 || $_Num>-10247) return ‘‘;
else {
foreach($_Data as $k=>$v){ if($v<=$_Num) break; }
return $k;
}
}
function _U2_Utf8_Gb($_C)
{
$_String = ‘‘;
if($_C <0x80) $_String .= $_C;
elseif($_C <0x800)
{
$_String .= chr(0xC0 | $_C>>6);
$_String .= chr(0x80 | $_C & 0x3F);
}elseif($_C <0x10000){
$_String .= chr(0xE0 | $_C>>12);
$_String .= chr(0x80 | $_C>>6 & 0x3F);
$_String .= chr(0x80 | $_C & 0x3F);
} elseif($_C <0x200000) {
$_String .= chr(0xF0 | $_C>>18);
$_String .= chr(0x80 | $_C>>12 & 0x3F);
$_String .= chr(0x80 | $_C>>6 & 0x3F);
$_String .= chr(0x80 | $_C & 0x3F);
}
return iconv(‘UTF-8‘, ‘GB2312‘, $_String);
}
function _Array_Combine($_Arr1, $_Arr2)
{
for($i=0; $i