header() 301 redirection implementation code_PHP tutorial

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Let’s look at an example first,

header('location: http://www.111cn.cn/');

The above is a simple jump. How do we make a permanent redirection? as follows.

Grammar
header(string,replace,http_response_code) parameter description
string required. Specifies the header string to be sent.
replace optional. Indicates whether this header replaces the previous header, or adds a second header.

Default is true (replacement). false (allow multiple headers of the same type).

http_response_code Optional. Force the http response code to the specified value. (php tutorial 4 and above available)

Among others, http_response_code is the 301 code we want to write, as follows.

$url = "http://www.zhutiai.com";
header("http/1.1 301 moved permanently");
header("location: $url");
exit();

Note: From php 4.4 onwards, this function prevents multiple headers from being sent at once. This is a protection measure against header injection attacks.

http://www.bkjia.com/PHPjc/445357.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/445357.htmlTechArticleLet’s first look at an example, header(location: http://www.111cn.cn/); The above is A simple jump, how do we make a permanent redirection. as follows. Syntax header(string,replace,http_respo...