How to change the encoding of php garbled code: 1. Add a line "" to the HTML page; 2. Add a line "header("Content -Type: text/html;charset=utf-8");". =utf-8'>

The operating environment of this article: windows7 system, PHP7.1 version, DELL G3 computer

php garbled code How to change the encoding?

PHP garbled code problem, UTF-8 (garbled code)

1. HTML page conversion to UTF-8 encoding problem

1. Add a line after the head and before the title:

<meta http-equiv=&#39;Content-Type&#39; content=&#39;text/html; charset=utf-8&#39; />

The order must not be wrong, the title displayed in

may be garbled!

2.html file encoding problem:

Click the menu of the editor: "File"->"Save As", you can see the encoding of the current file, make sure the file encoding is: UTF -8,

If it is ANSI, you need to change the encoding to: UTF-8.

3. HTML file header BOM problem:

When converting a file from other encodings to UTF-8 encoding, sometimes a BOM tag is added at the beginning of the file,

A BOM tag may cause the browser to display garbled characters when displaying Chinese characters.

How to delete this BOM tag:

1. You can open the file with Dreamweaver and resave it to remove the BOM tag!

2. You can open the file with EditPlus, and in the menu "Preferences"->"File"->"UTF-8 Identity", set it to: "Always delete signature",

Then save the file and you can remove the BOM tag!

4. WEB server UTF-8 encoding problem:

If you follow the steps listed above and still have Chinese garbled problems,

Please check your Encoding problem of the WEB server used

If you are using Apache, please set the charset in the configuration file to: utf-8 (only the methods are listed here, please refer to the apache configuration file for the specific format)

If you are using Nginx, please set the charset in nginx.conf to utf-8.

Specify find "charset gb2312;" or similar statement and change it to: " charset utf-8;".

2. PHP page conversion to UTF-8 encoding problem

1. Add a line at the beginning of the code:

header("Content-Type: text/html;charset=utf-8");

2. PHP file encoding problem

Click the editor's menu: "File" -> "Save As", you can see the encoding of the current file, make sure the file encoding is: UTF-8,

If it is ANSI, you need to change the encoding to: UTF-8.

3. PHP file header BOM problem:

PHP files must not have BOM tags

Otherwise, the session will not be used, and there will be a similar prompt:

Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent

This is because, when executing session_start(), the entire page cannot be Output, but when the BOM tag exists in the previous PHP page,

PHP treats this BOM tag as output, so an error occurs!

So the PHP page must delete the BOM tag

How to delete this BOM tag:

1. You can open the file with Dreamweaver and resave it , that is, the BOM label can be removed!

2. You can open the file with EditPlus, and in the menu "Preferences"->"File"->"UTF-8 Identity", set it to: "Always delete signature",

Then save the file and you can remove the BOM tag!

4. UTF-8 encoding problem when PHP saves files as attachments:

When PHP saves files as attachments, the file name must be GB2312 encoded,

Otherwise , if there is Chinese in the file name, it will be garbled:

If your PHP itself is a file in UTF-8 encoding format,

You need to convert the file name variable from UTF-8 Into GB2312:

iconv("UTF-8", "GB2312", "$filename");

5. When the article title is truncated and displayed, garbled characters or "?" question marks appear:

Generally, when the article title is very long, part of the title will be displayed, which will affect the article. The title is truncated,

Since a Chinese character in UTF-8 encoding format will occupy 3 characters of width,

When intercepting the title, sometimes only 1 character of a Chinese character will be intercepted Or 2 characters wide,

is not completely intercepted, and garbled characters or "?" question marks will appear.

Use the following function to intercept the title, and there will be no problem:

function get_brief_str($str, $max_length) 
{ 
echo strlen($str) ."<br>"; 
if(strlen($str) > $max_length) 
{ 
$check_num = 0; 
for($i=0; $i < $max_length; $i++) 
{ 
if (ord($str[$i]) > 128) 
$check_num++; 
} 
if($check_num % 3 == 0) 
$str = substr($str, 0, $max_length)."..."; 
else if($check_num % 3 == 1) 
$str = substr($str, 0, $max_length + 2)."..."; 
else if($check_num % 3 == 2) 
$str = substr($str, 0, $max_length + 1)."..."; 
} 
return $str; 
}

3. Problems with using UTF-8 encoding for MYSQL database

1. Use phpmyadmin to create databases and data tables

When creating a database , please set "Organization" to: "utf8_general_ci"

Or execute the statement:

CREATE DATABASE `dbname` DEFAULT CHARACTER SET utf8 COLLATE utf8_general_ci;

When creating a data table: If the field stores Chinese, you need to set "Organization" Set to: "utf8_general_ci",

If the field stores English or numbers, the default is fine.

Corresponding SQL statement, for example:

CREATE TABLE `test` ( 
`id` INT NOT NULL , 
`name` VARCHAR( 10 ) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL , 
PRIMARY KEY ( `id` ) 
) ENGINE = MYISAM ;

2. Use PHP to read and write the database

After connecting to the database:

[hide]$connection = mysql_connect($host_name, $host_user, $host_pass);

Add two lines:

mysql_query("set character set 'utf8'");//讀庫
mysql_query("set names 'utf8'");//寫庫

就可以正常的讀寫MYSQL數(shù)據(jù)庫了。

四.JS相關(guān)的UTF-8編碼問題

1.JS讀Cookie的中文亂碼問題

PHP寫cookie的時(shí)候需要將中文字符進(jìn)行escape編碼，

否則JS讀到cookie中的中文字符將是亂碼。

但php本身沒有escape函數(shù)，我們新寫一個(gè)escape函數(shù)：

function escape($str) 
{ 
preg_match_all("/[\x80-\xff].|[\x01-\x7f]+/",$str,$r); 
$ar = $r[0]; 
foreach($ar as $k=>$v) 
{ 
if(ord($v[0]) < 128) 
$ar[$k] = rawurlencode($v); 
else 
$ar[$k] = "%u".bin2hex(iconv("UTF-8","UCS-2",$v)); 
} 
return join("",$ar); 
}

JS讀cookie的時(shí)候，用unescape解碼，

然后就解決cookie中有中文亂碼的問題了。

2.外部JS文件UTF-8編碼問題

當(dāng)一個(gè)HTML頁面或則PHP頁面包含一個(gè)外部的JS文件時(shí)，

如果HTML頁面或則PHP頁面是UTF-8編碼格式的文件，

外部的JS文件同樣要轉(zhuǎn)成UTF-8的文件，

否則將出現(xiàn)，沒有包含不成功，調(diào)用函數(shù)時(shí)沒有反應(yīng)的情況。

點(diǎn)擊編輯器的菜單：“文件”->“另存為”，可以看到當(dāng)前文件的編碼，確保文件編碼為：UTF-8，

如果是ANSI，需要將編碼改成：UTF-8。

五.FLASH相關(guān)的UTF-8編碼問題

FLASH內(nèi)部對所有字符串，默認(rèn)都是以UTF-8處理?

1.FLASH讀文普通本文件(txt,html)?

要將文本文件的編碼存為UTF-8?

點(diǎn)擊編輯器的菜單：“文件”->“另存為”，可以看到當(dāng)前文件的編碼，確保文件編碼為：UTF-8，?

如果是ANSI，需要將編碼改成：UTF-8。?

2.FLASH讀XML文件?

要將XML文件的編碼存為UTF-8?

點(diǎn)擊編輯器的菜單：“文件”->“另存為”，可以看到當(dāng)前文件的編碼，確保文件編碼為：UTF-8，?

如果是ANSI，需要將編碼改成：UTF-8。?

在XML第1行寫：?

3.FLASH讀PHP返回?cái)?shù)據(jù)?

如果PHP編碼本身是UTF-8的，直接echo就可以了?

如果PHP編碼本身是GB2312的，可以將PHP轉(zhuǎn)存成UTF-8編碼格式的文件，直接echo就可以了

如果PHP編碼本身是GB2312的，而且不允許改文件的編碼格式，?

用下面的語句將字符串轉(zhuǎn)換成UTF-8的編碼格式?

$new_str = iconv("GB2312", "UTF-8", "$str");?

再echo就可以了?

4.FLASH讀數(shù)據(jù)庫(MYSQL)的數(shù)據(jù)?

FLASH要通過PHP讀取數(shù)據(jù)庫中的數(shù)據(jù)?

PHP本身的編碼不重要，關(guān)鍵是如果數(shù)據(jù)庫的編碼是GB2312的話，?

需要用下面的語句將字符串轉(zhuǎn)換成UTF-8的編碼格式?

$new_str = iconv("GB2312", "UTF-8", "$str");?

5.FLASH通過PHP寫數(shù)據(jù)?

一句話，F(xiàn)LASH傳過來的字符串是UTF-8格式的，?

要轉(zhuǎn)換成相應(yīng)的編碼格式，再操作（寫文件、寫數(shù)據(jù)庫、直接顯示等等）?

還是用iconv函數(shù)轉(zhuǎn)換?

6.FLASH使用本地編碼(理論上不推薦使用)?

如果想讓FLASH不使用UTF-8編碼，而是使用本地編碼?

對于中國大陸地區(qū)而言，本地編碼是GB2312或GBK?

AS程序內(nèi)，可以添加以下代碼：?

System.useCodepage = true;?

那么FLASH內(nèi)所有字符都是使用GB2312的編碼了?

所有導(dǎo)入到FLASH或者從FLASH導(dǎo)出的數(shù)據(jù)，都應(yīng)該做相應(yīng)的編碼轉(zhuǎn)換?

因?yàn)槭褂帽镜鼐幋a，會造成使用繁體中文地區(qū)的用戶產(chǎn)生亂碼，所以不推薦使用

推薦學(xué)習(xí)：《PHP視頻教程》

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