How to pass values ​​between different pages in php

php methods to implement value transfer between different pages: 1. Use require_once to implement; 2. Use form submission to implement; 3. Use SESSION sessions to implement; 4. Use COOKIE to implement.

The method is as follows:

(Recommended tutorial: php video tutorial)

Method one: require_once

//Page a:
    <?php
            $a = "hello";
    ?>
//Page b:
    <?php
        require_once "A.php";
        echo $a." world!";
    ?>

Method 2: Carrying parameters and passing values ​​when jumping through the page

//Page a:
<?php
    $a = "world";
?>
    <a href="b.php?m=$a">点我跳到b.php</a>
//Page b:
<?php
    echo "hello".$_GET[&#39;m&#39;];
?>

Method 3: Form submission

<form name="form1" method="post" action="2.php">
  <input type="text" name="val" />
  <input type="submit" name="Submit" value="提交" />
</form>
//2.php：
<?php
    echo $_POST[&#39;val&#39;];
?>

Method 4: SESSION session

(SESSION is a global variable. As long as it is declared, it is available on all pages until the web page is closed or the cycle of SESSION is not reached, and POST and GET will be released immediately as soon as PHP is executed)

<?php
    session_start();
    $_SESSION[&#39;val&#39;]=&#39;123&#39;;
    echo $_SESSION[&#39;val&#39;];
?>
<?php
    session_start();
    echo $_SESSION[&#39;val&#39;];    //直接输出全局变量val.
?>

Method five: cookies.

Cookie is stored on the client (also a global variable), and session is stored on the server. This is the only difference between the two.

<?php    
setcookie("user", "SUVLLIAN", time()+3600);    
//创建一个名为user的cookie变量，它的值是Alex Porter。它将在一个小时以后过期，也就是不能访问了
echo $_COOKIE[&#39;user&#39;];    //还要刷新一下页面才可以生效?>

Method 6: Store in the database and then retrieve it

The advantage is: it can be stored for a long time.

The disadvantage is that every time it needs to be used, it needs to be queried in the database, which consumes a lot of resources.

Related recommendations: php training

The above is the detailed content of How to pass values ​​between different pages in php. For more information, please follow other related articles on the PHP Chinese website!