php 编码的问题

php的mb_convert_encoding函数

提示此函数未定义,"Call to undefined function:mb_convert_encoding()",

解决办法:

需要加载php_mbstring扩展

windows下修改php.ini文件 , 把;extension=php_mbstring.dll前的分号去掉

下载php_mbstring.dll 下载地址:http://jjdx.downbai.com:888/dll/php_mbstring.dll 放到php.ini的同级目录

重起apache



curl设置编码
<?
#FUNCION GET OBTIENE EL CODE SOURCE
function GET($url) {
$curl = curl_init();
$header[] = "Accept: text/xml,application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5";
$header[] = "Cache-Control: max-age=0";
$header[] = "Connection: keep-alive";
$header[] = "Keep-Alive: 300";
$header[] = "Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7";
$header[] = "Accept-Language: en-us,en;q=0.5";
$header[] = "Pragma: ";
curl_setopt($curl, CURLOPT_URL, $url);
curl_setopt($curl, CURLOPT_USERAGENT, 'Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.15) Gecko/2008111317  Firefox/3.0.4');
curl_setopt($curl, CURLOPT_HTTPHEADER, $header);
curl_setopt($curl, CURLOPT_REFERER, 'http://www.google.com');
curl_setopt($curl, CURLOPT_ENCODING, 'gzip,deflate');
curl_setopt($curl, CURLOPT_AUTOREFERER, true);
curl_setopt($curl, CURLOPT_COOKIEJAR, "my_cookies.txt");
curl_setopt($curl, CURLOPT_COOKIEFILE, "my_cookies.txt");
curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($curl, CURLOPT_TIMEOUT, 10);
$html = curl_exec($curl);
curl_close($curl);
return $html;
}

function POST($mail,$sid){
$curl = curl_init();
$post = "user=".$mail."%40spamavert.com&sc=".$sid;
$header[] = "Accept: text/xml,application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5";
$header[] = "Cache-Control: max-age=0";
$header[] = "Connection: keep-alive";
$header[] = "Keep-Alive: 300";
$header[] = "Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7";
$header[] = "Accept-Language: en-us,en;q=0.5";
$header[] = "Pragma: ";
curl_setopt($curl, CURLOPT_URL, "http://password.esp.am/index.php?action=reminder;sa=mail");
curl_setopt($curl, CURLOPT_USERAGENT, 'Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.15) Gecko/2008111317  Firefox/3.0.4');
curl_setopt($curl, CURLOPT_HTTPHEADER, $header);
curl_setopt($curl, CURLOPT_REFERER, 'http://password.esp.am/index.php?action=reminder');
curl_setopt($curl, CURLOPT_ENCODING, 'gzip,deflate');
curl_setopt($curl, CURLOPT_AUTOREFERER, true);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($curl, CURLOPT_TIMEOUT, 10);
curl_setopt($curl, CURLOPT_POST, 1);
curl_setopt($curl, CURLOPT_COOKIEJAR, "my_cookies.txt");
curl_setopt($curl, CURLOPT_COOKIEFILE, "my_cookies.txt");
curl_setopt($curl, CURLOPT_POSTFIELDS,$post);
$result= curl_exec ($curl);
curl_close ($curl);
return $result;
}
mb_convert_encoding这个函数是用来转换编码的。原来一直对程序编码这一概念不理解,不过现在好像有点开窍了。

不过英文一般不会存在编码问题,只有中文数据才会有这个问题。比如你用Zend
Studio或Editplus写程序时,用的是gbk编码,如果数据需要入数据库,而数据库的编码为utf8时,这时就要把数据进行编码转换,不然进到
数据库就会变成乱码。



mb_convert_encoding的用法见官方:

http://cn.php.net/manual/zh/function.mb-convert-encoding.php



做一个GBK To UTF-8

< ?php

header("content-Type: text/html; charset=Utf-8");

echo mb_convert_encoding("妳係我的友仔", "UTF-8", "GBK");

?>



再来个GB2312 To Big5

< ?php

header("content-Type: text/html; charset=big5");

echo mb_convert_encoding("你是我的朋友", "big5", "GB2312");

?>

不过要使用上面的函数需要安装但是需要先enable mbstring 扩展库。



PHP中的另外一个函数iconv也是用来转换字符串编码的,与上函数功能相似。



下面还有一些详细的例子:

iconv — Convert string to requested character encoding

(PHP 4 >= 4.0.5, PHP 5)

mb_convert_encoding — Convert character encoding

(PHP 4 >= 4.0.6, PHP 5)



用法:

string mb_convert_encoding ( string str, string to_encoding [, mixed
from_encoding] )

需要先enable mbstring 扩展库,在 php.ini里将; extension=php_mbstring.dll 前面的 ; 去掉

mb_convert_encoding 可以指定多种输入编码,它会根据内容自动识别,但是执行效率比iconv差太多;





string iconv ( string in_charset, string out_charset, string str )

注意:第二个参数,除了可以指定要转化到的编码以外,还可以增加两个后缀://TRANSLIT 和 //IGNORE,其中 //TRANSLIT
会自动将不能直接转化的字符变成一个或多个近似的字符,//IGNORE 会忽略掉不能转化的字符,而默认效果是从第一个非法字符截断。

Returns the converted string or FALSE on failure.





使用:



发现iconv在转换字符”—”到gb2312时会出错,如果没有ignore参数,所有该字符后面的字符串都无法被保存。不管怎么样,这个”—”都无法
转换成功,无法输出。 另外mb_convert_encoding没有这个bug.



一般情况下用 iconv,只有当遇到无法确定原编码是何种编码,或者iconv转化后无法正常显示时才用mb_convert_encoding
函数.



from_encoding is specified by character code name before conversion. it
can be array or string - comma separated enumerated list. If it is not
specified, the internal encoding will be used.

/* Auto detect encoding from JIS, eucjp-win, sjis-win, then convert str
to UCS-2LE */

$str = mb_convert_encoding($str, “UCS-2LE”, “JIS, eucjp-win,
sjis-win”);

/* “auto” is expanded to “ASCII,JIS,UTF-8,EUC-JP,SJIS” */

$str = mb_convert_encoding($str, “EUC-JP”, “auto”);



例子:

$content = iconv(”GBK”, “UTF-8″, $content);

$content = mb_convert_encoding($content, “UTF-8″, “GBK”);
原文地址:https://www.cnblogs.com/danghuijian/p/4400361.html