PHP function header() implements page jump

There are multiple methods for page jump. First, we will introduce the implementation method of using the built-in functions in PHP, mainly using the header() function. The main function of the
header() function is to output the HTTP protocol header (header) to the browser.

Syntax

header(string,replace,http_response_code)
Parameter description string required. Specifies the header string to be sent. replace is 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 is optional. Forces the HTTP response code to the specified value. (Available in PHP 4 and above)

Tips and Notes

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.

Specific code:

< ?php
//重定向浏览器
header("Location: http://www.php.cn");
//确保重定向后，后续代码不会被执行
exit;
?>

< ?php
//重定向到news.php页面
header("Location: news.php");
//确保重定向后，后续代码不会被执行
exit;
?>

Notes:
This function needs to change the PHP.INI file to take effect. Find the php.ini configuration file, then search for one item: output_buffering, change its value from off to on, and restart Apache.

Appendix (two other jump implementation methods):

Method 1: Use the Meta tag

The Meta tag is a tag in HTML responsible for providing document meta-information. Using this tag in a PHP program can also achieve page jumps change. If http-equiv is defined as refresh, when the page is opened, it will jump to the corresponding page within a certain period of time based on the value specified by content.

If content="seconds;url=website" is set, it defines how long it takes for the page to jump to the specified URL. For example, use the meta tag to automatically jump to the Guanwei blog after the vaccine.

< meta http-equiv="refresh" content="1;url=http://www.php.cn">

For example, the following program meta.php implements the page to automatically jump to the ph Chinese website after staying on the page for one second

Method 2: Use JS

< ?php
echo "<script language=&#39;javascript&#39; type=&#39;text/javascript&#39;>";
echo "window.location.href=&#39;http://www.php.cn&#39;";
echo "</script>";
?>

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