Discuss several implementation techniques for PHP page jump, discuss PHP page jump_PHP tutorial

Discuss several implementation techniques of PHP page jump, discuss PHP page jump

PHP is the preferred language used by many programmers to develop WEB. In actual development, various functions of the website can be satisfied by writing in PHP language, such as PHP page jump.

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In the Web system, jumping from one web page to another web page is one of the most commonly used technologies in the LAMP project. Page jumps may be caused by users clicking links, buttons, etc., or they may be automatically generated by the system. Here we introduce the methods commonly used in PHP to achieve automatic page jump.

PHP page jump 1, header() function

The header() function is a very simple method for page jump in PHP. The main function of the header() function is to output the HTTP protocol header (header) to the browser.

The header() function is defined as follows:

void header (string string [,bool replace [,int http_response_code]])

The optional parameter replace specifies whether to replace the previous similar header or add a header of the same type. The default is replacement.

The second optional parameter http_response_code forces the HTTP response code to the specified value. The Location type header in the header function is a special header call, often used to implement page jumps. Note: 1. There cannot be a space between location and ":", otherwise it will not jump.

2. There cannot be any output before using the header.

3. The PHP code after the header will also be executed. For example, redirect the browser to the official Lamp Brothers forum

1. < ?php
2. //Redirect browser
3. header("Location: http://bbs.
   lampbrother.net");
4. //Ensure that after redirection, subsequent code will not be executed
5. exit;
6. ?>

PHP page jump 2, Meta tag

The

Meta tag is a tag in HTML that is responsible for providing document meta-information. Using this tag in a PHP program can also achieve page jumps. 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, the meta tag is used to automatically jump to the LAMP Brothers Band official forum after the vaccine is released.

1. < meta http-equiv="refresh"
2. content="1;url=http://
   bbs.lampbrother.net">

For example, the following program meta.php implements the page to automatically jump to bbs.lampbrother.net after staying on the page for one second.

1. < ?php
2. $url = "http://bbs.lampbrother.net"; ?>
3. < html>
4. < head>
5. < meta http-equiv="refresh" content="1;
6. url=< ?php echo $url; ?>">
7. < /head>
8. < body>
9. The page only stays for one second...
10. < /body>
11. < /html>

PHP page jump 3, JavaScript

For example, this code can be placed anywhere in the program that is legal.

1. < ?php
2. $url = "http://bbs.lampbrother.net";
3. echo "< script language='javascript'
4. type='text/javascript'>";
5. echo "window.location.href='$url'";
6. echo "< /script>";
7. ?>

The above are the three PHP page jump implementation methods we introduced to you.

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