How to pass values between different pages in php-PHP Problem-php.cn

How to pass values between different pages in php

王林

Release： 2023-03-05 21:44:01

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How PHP transfers values between different pages: 1. Use post to transfer values; 2. Use get to transfer values; 3. Use session to transfer values. Session is a type of global variable. It is often used to save common data such as user ID after the user logs in. Choosing session is a very good choice.

How to pass values between different pages in php

Three commonly used methods:

1. POST value transmission

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Post value is a method used for HTML

form jump, which is very convenient to use. For example:

 <html>
 <form action=&#39;&#39; method=&#39;&#39;>
 <input type=&#39;text&#39; name=&#39;name1&#39;>
 <input type=&#39;hidden&#39; name=&#39;name2&#39; value=&#39;value&#39;>
 <input type=&#39;submit&#39; value=&#39;提交&#39;>
 </form>
 </html>

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The action in the form is filled in with the url path of the jump page, and the method is filled in with the post method. After the submit button in the form is pressed, all the content with name in the form will be transferred to the filled in URL, which can be obtained through $_POST['name'], for example:

<?php
$a=$_POST[&#39;name1&#39;];
$b=$_POST[&#39;name2&#39;];
?>

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here A very convenient tip. When selecting type as 'hidden' in the input tag, the input tag will be hidden and will not be displayed on the page. However, if the input tag is in the form and has a name value and a value value, it will also follow The submit button is passed, and this hidden label can pass some content that you don't want to display.

2. GET value transfer

GET transfer value is passed by following the url. When the page jumps, it jumps with the url. Commonly used in the use of tags. For example:

<a href=&#39;delete.php?id=value&#39;>点我跳转</a>

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After jumping to xxx.php, you can get the passed value through $_GET['id']. The GET method is often used in URLs to delete or read a php file with a certain ID.

3. SESSION value transfer

SESSION is a type of global variable, which is often used to save common data such as user ID after the user logs in. Once saved to SESSION, other pages can be obtained through SESSION. To use SESSION, you need to open the session:

<?php
//session赋值
   session_start();
   $_SESSION[&#39;one&#39;]=value1;
   $_SESSION[&#39;two&#39;]=value2;
 
//session值的读取:
   $one = $_SESSION[&#39;one&#39;];
    
   //session值的销毁
   unset($_SESSION[&#39;one&#39;]);
?>

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The above three methods are common methods, you can refer to them.

Regarding the pros and cons of the three methods, the value passed by get is displayed in the URL link, which is very unsafe. If you want to link to another page, post is not convenient to use. It is very good and convenient to choose session. Methods.

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