通過jQuery中的ajax將值存儲在php數組/會話中

Question

我想通過ajax在jquery中將值存儲在PHP數組或PHP會話中，我要在php頁面上通過ajax發送一些值，並希望存儲它們

問題：每次數組/會話返回最新發送的值，而不是我發送的先前值
我希望以前發送的值應保留在數組或會話中

我的代碼在下面

Js文件代碼

$.ajax({
                url: "http://domain.com/ajax.php",
                type:"POST",
                data: { name : nname , 
                    clas : nclass , 
                    rows : nrows ,
                    cols : ncols , 
                    types : ntype , 
                    check : ncheck , 
                    count : ncldiv
                 },

            success: function(data){
             alert(data); 
           }
            });

PHP文件

<?php
        session_start(); 
        $_SESSION['feilds'] = array();    
        $type = $_POST['types'];
        $name = $_POST['name'];
        $class = $_POST['clas'];
        $rows = $_POST['rows'];
        $cols = $_POST['cols'];
        $check = $_POST['check'];
        $count = $_POST['count'];
         $output_string = array('TYPE'=>$type,'NAME'=>$name,'CLASS'=>$class,'ROWS'=>$rows,'COLS'=>$cols,'REQUIRED'=>$check);
        array_push($_SESSION['feilds'] , $output_string );
        print_r($_SESSION['feilds']);
?>

Answer 1

這是由於$_SESSION['feilds'] = array(); 。

當頁面被調用時， $_SESSION['feilds']被分配空白數組。這就是為什么您只獲得當前值的原因。

通過使用isset或empty來檢查$_SESSION['feilds']是否存在

if(empty( $_SESSION['feilds'] )) {
  $_SESSION['feilds'] = array();
}

Answer 2

問題是您總是將$_SESSION['feilds']變量實例化為空白數組。 用這個：

<?php
    session_start(); 
    if (!isset($_SESSION['feilds'])) {
        $_SESSION['feilds'] = array();
    }
    $type = $_POST['types'];
    $name = $_POST['name'];
    $class = $_POST['clas'];
    $rows = $_POST['rows'];
    $cols = $_POST['cols'];
    $check = $_POST['check'];
    $count = $_POST['count'];
     $output_string = array('TYPE'=>$type,'NAME'=>$name,'CLASS'=>$class,'ROWS'=>$rows,'COLS'=>$cols,'REQUIRED'=>$check);
    array_push($_SESSION['feilds'] , $output_string );
    print_r($_SESSION['feilds']);
?>

Answer 3

    you wrote  $_SESSION['feilds'] = array();
    Every time it  assign a empty array at session so it will wash out previous data. 
if you want to retain your previous data then first add check like 
        if(empty( $_SESSION['feilds'] )) {
          $_SESSION['feilds'] = array();
        }
        after that you assign value to session as you are doing 
hope it will help you :)