php判斷字符串是否包含某個字符串，PHP 判斷字符的編碼 并輸出想要的編碼格式字符 （轉）

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/**
 * 判斷字符編碼? 并輸出想要的編碼
 * Enter description here ...
 * @param unknown_type $string
 * @param unknown_type $outEncoding
 */?
function safeEncoding($string,$outEncoding ='UTF-8') {?
??????? $encoding = "UTF-8";?
??????? for($i=0;$i<strlen($string);$i++){?
??????????? if(ord($string{$i})<128)?
??????????? continue;?
??????????? if((ord($string{$i})&224)==224){?
??????????????? //第一個字節判斷通過?
??????????????? $char = $string{++$i};?
??????????????? if((ord($char)&128)==128){?
??????????????????? //第二個字節判斷通過?
??????????????????? $char = $string{++$i};?
??????????????????? if((ord($char)&128)==128)?
??????????????????? {?
??????????????????????? $encoding = "UTF-8";?
??????????????????????? break;?
??????????????????? }?
??????????????? }?
??????????? }?
??????????? if((ord($string{$i})&192)==192){?
??????????????? //第一個字節判斷通過?
??????????????? $char = $string{++$i};?
??????????????? if((ord($char)&128)==128){?
??????????????????? // 第二個字節判斷通過?
??????????????????? $encoding = "GB2312";?
??????????????????? break;?
??????????????? }?
??????????? }?
??????? }?
??????????
??????? if(strtoupper($encoding) == strtoupper($outEncoding))?
??????? return $string;?
??????? else?
??????? return iconv($encoding,$outEncoding,$string);?
??? }?
http://blog.csdn.net/yw5201314/article/details/8665099