如何在另一个请求之前存储PHP变量

Question

如何在PHP脚本中存储PHP变量,然后在另一个PHP脚本中使用该变量？

我试过这段代码,但它不起作用:

<?php                       
                    session_start();
                            $util=$_POST['util'];
                            $pw=$_POST['pw'];
                            include("abrebdvendas.php");
                            //testar a exist?ncia de liga??o ao MySQL
                            $ligax=mysql_connect($host,$user,$senha);
                            if (!$ligax) {
                                    echo 'Erro: Falha na liga&#231;&#227;o'.'<br>';
                                    exit;
                                    }
                                    //ligar ? base de dados vendas
                                    mysql_select_db($dbname,$ligax);
                                    //criar uma query para inser??o do registo
                                    $lista="select * from utilizador where util='$util' and pw='$pw'";
                                    $result=mysql_query($lista) or die(mysql_error());
                                    $dados = mysql_fetch_array($result);
                                    $u=$dados['util'];
                                    $p=$dados['pw'];
                            if ($u=='' or $p=='')
                            {
                            echo "Tente de novo";
                            echo '<meta HTTP-EQUIV="Refresh" CONTENT="1; URL=http://localhost/ola1/Site/Sem%20Log%20In/longin.html">';
                            } 
                            else if ($u==$util and $p==$pw)
                                    {
                                    //obter tipo valor
                                    echo '<h2>Bem vindo '.$util.'</h2><br>';
                                    $paulo=$_POST['util'];
                                    echo '<meta HTTP-EQUIV="Refresh" CONTENT="100; URL=http://localhost/ola1/Site/Com%20LogIn/paginicial.php">';

                                     $_SESSION['myNumber']=$num;                
                                                                        }
                                    else
                                    {
                                    echo "Tente de novo";
                                    echo '<meta HTTP-EQUIV="Refresh" CONTENT="0.1; URL=http://localhost/ola1/Site/Sem%20Log%20In/longin.html">';
                                    }                                   
                    ?>

代码来自这里.

Answer 1

当你想使用存储在另一个页面中另一个变量中的某个变量的值时,你应该使用$ _SESSION [],如下所示:

 $_SESSION['myNumber']=$num;

您需要在php页面的顶部启动会话,如下所示:

 <?php
ob_start();
@session_start();
?>

并从另一个PHP文件获取变量,如下所示

$newnum = $_SESSION['myNumber'];