$ .post之前的php加载 [英] php loading before $.post

问题描述

我有一个主页，我们将其称为第A页.我在第A页上有一个导航菜单，当单击某个项目时，该菜单从jQuery执行$ .post.然后，当它完成时，将隐藏几个div并显示一个.

I have a main page we'll call it page A. I have a navigation menu on page A that executes $.post from jQuery when an item is clicked. Then when it finishes it hides a few div's and shows one.

它显示的div有一个PHP文件来扩大内容.这是将$ .post发送到的PHP文件，该文件包含在A页上.

Well the div it shows has a PHP file inflating the content. This is the same PHP file it sends the $.post to and this file is included on page A.

因此，当页面加载导航和隐藏的div时，它还会加载PHP文件而没有 $ .post数据.

So when the page loads the nav and hidden divs it also loads the PHP file without the $.post data.

这是一些代码，我会进一步解释

Here is some code and I'll explain further

jQuery

$('#projects').click(function (e) {
    $.trim(account_id); 
    $.post('core/functions/projects.php', { 
        account_id: account_id                    
    })
    .done(function(data) {      
        $('#scd').hide();
        $('#icd').hide();       
        $('#pcd').fadeIn(1000);     
    })
    .fail(function(jqXHR, status, error) {
        alert(error);
    }); 

});

PHP

<?php

if(empty($_POST) === false) {

    $account_id = $_POST['account_id'];

    try {
        $query_projectInfo = $db->prepare("
            SELECT  projects.account_id,
                    projects.project_name,                  
                    .... //more code, not relevant 
            FROM projects
            WHERE account_id = ?                        
        "); 

        $query_projectInfo->bindValue(1, $account_id, PDO::PARAM_STR);
        $query_projectInfo->execute();
        $count = $query_projectInfo->rowCount();

        if ($count > 0) {
            echo "<table class='contentTable'>";
            echo "<th class='content_th'>" . "Job #" . "</th>";
            echo "<th class='content_th'>" . "Project Name" . "</th>";
            ... //more code, not relevant            
            while ($row = $query_projectInfo->fetch(PDO::FETCH_ASSOC)) {                
                echo "<tr>";
                echo "<td class='content_td'>" . "<a href='#'>" . $row['account_id'] . "</a>" . "</td>";
                echo "<td class='content_td'>" . $row['project_name'] . "</td>";
                .... //more code, not relevant                  
            }
            echo "</table>";            
        }       
    } catch(PDOException $e) {
        die($e->getMessage());
    }
} else {
    echo 'could not load projects table';
}
?> 

现在，当我在导航菜单上单击#project时，仅能看到else语句无法加载项目表".我相信这是因为PHP文件是在单击导航项之前加载的.看来，当我单击该项目并发送帖子时，就像PHP页上所说:我已经加载了好友，我不会再这样做了".

Now all I ever see when I click #project on the nav menu is the else statement of 'could not load projects table'. I believe this is because the PHP file is loaded before the nav item is ever clicked. It seems like when I click the item and send the post it's like the PHP page says "i already loaded buddy, I'm not doing that again".

所以我的问题是，如何使PHP文件等待加载?我以为if else条件会做到这一点，显然我是错的.

So my question is, how would I make the PHP file wait to load? I thought that if else condition would do it, obviously I was wrong.

P.S.如果我给$ account_id变量一个值，而不是等待发布，则div会随表格和所有信息一起膨胀.因此PHP文件是可操作的.它只是不等待$ .post

P.S. If I give the $account_id variable a value rather than wait for post the div inflates with the table and all the info. So the PHP file is operational. It just doesn't wait for that $.post

推荐答案

此检查将永远不会触发. empty($_POST) === false

This check will never fire. empty($_POST) === false

如果您只是想检查$_POST是否有数据，只需使用isset($_POST)

If you're simply wanting to check if $_POST has data, just use isset($_POST)

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