Summary of Several Methods for Passing Parameter Values ​​in PHP Pages_PHP Tutorial

php is a server scripting language, and it is also the most popular WEB development language. Let's talk about several methods of passing parameters between four pages commonly used in PHP development applications.

First type:
Uses client browser cookies. Cookie is easy to understand. It is a temporary file. You can think of it as a storage room. The browser records some information during the browsing process and temporarily stores it here.
Set a cookie in page01.

The code is as follows	Copy code
代码如下	复制代码
setcookie("VisitTimes",$VisitTimes,time()+31536000); ?>

​​ ​ setcookie("VisitTimes",$VisitTimes,time()+31536000);

?>

It’s that simple, we have created the cookie.

We define a variable mycookie, whose value is the string 'self'.

We can name the cookie variable whatever we want and define multiple cookie variables.

代码如下	复制代码
$HTTP_COOKIE_VARS["VisitTimes"]?($VisitTimes ++):($VisitTimes = 1);     echo "欢迎你第 ".$VisitTimes.   " 光临我的主页 n";   ?>

Accept cookies on page02.

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$HTTP_COOKIE_VARS["VisitTimes"]?($VisitTimes ++):($VisitTimes = 1); echo "Welcome ".$VisitTimes. " Visit my homepage n"; ?>

For more details, please check: http://www.bKjia.c0m/phper/php-gj/33355.htm
We use $_COOKIE[] to extract the variable mycookie in the cookie and pay its value to $wuziling. Then simply output.
Okay, here we are done using cookies to pass parameters from page to page.

代码如下	复制代码
session_start(); $_SESSION["temp"]=array('123','456','789'); ?>

Second type:

Use server-side session. Understanding session is very easy. The difference from a cookie is that it is a temporary storage on the server side. Session is often called a session.

代码如下	复制代码
session_start();      for($i=0;$i      {              echo $_SESSION['temp'][$i].' ';      } ?>

Set up a session in page01.

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session_start(); $_SESSION["temp"]=array('123','456','789'); ?>

To use session, session must be started. session_start(); is the method to start the session. Generally it should be written first. In the second statement, I defined a $_SESSION["temp"] array. The name of the array is $_SESSION["temp"], which stores 3 strings. Accept the session on page02.

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Session_start(); for($i=0;$i { echo $_SESSION['temp'][$i].' '; } ?>

First start a session. After startup, the variables we defined in page01 are already available and do not require any other acquisition operations. This is different from cookies.
Below we use a for loop to output its content.
[Don’t think that $_SESSION['temp'][$i] is a two-dimensional array. It is a one-dimensional array. The name of the array is $_SESSION["temp"]. Although this name is complicated, the subscript of the array is ' temp'】
[When we write $_SESSION["temp"], temp plus double quotes or single quotes are equivalent. 】
[Here when we define session variables, we define arrays, or we can define ordinary variables, just like what is mentioned in cookies]

Third type:

Use a form to deliver.
_post can only receive data in PHP when it obtains the method="post" of the form, as shown in the following code

The code is as follows

代码如下	复制代码
a.php页面 if( $_post ) {  echo $_post['cn']; } else {     echo '没有获取到值'; } ?>

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a.php page

代码如下	复制代码
$var = 'I love you !'; ?> ">get

if( $_post )
{

echo $_post['cn'];

代码如下	复制代码
echo   $_GET['new']; ?>

}

else

{

echo 'No value obtained'; } ?>

The fourth type:

Use hyperlinks to pass parameters. Many of our online operations involve clicking on hyperlinks to jump between web pages. Parameters can also be passed while clicking.

page01.php writes like this:

?>">get

The code is as follows	Copy code
$var = 'I love you!';

Define a variable $var. The href attribute of hyperlink a states that it will jump to the page02 page. Add a question mark after it, and a self-defined variable new [this name will be used on the page02 page]. The value of new is the $var we want to pass. page02.php writes like this:

The code is as follows

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echo $_GET['new']; ?> Use $_GET[ ] to get the value of new, and then you can output or use it for other purposes. Note: http get method is not suitable for large variable values; the value cannot exceed 100 characters. $_request variable PHP's $_request variable contains the contents of $_get, $_post and $_cookie. php’s $_request variable can be used to obtain the results of form data sent through the get and post methods. Example welcome . you are years old! Summary: We mentioned above that there are four ways to pass parameters on the page, session, cookie, post, and get. There are probably so many other programming languages. Post and get are basically used to pass parameters in forms and urls. Pages Cookie and session are saved in a global file or variable. http://www.bkjia.com/PHPjc/629140.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/629140.htmlTechArticlephp is a server scripting language. It is also the most popular WEB development language now. Let’s talk about it below. Several parameters are passed between the four commonly used pages in PHP development applications...