Javascript变量到PHP变量-如果语句不起作用，则发布

Javascript variable to PHP variable - Post if statement isnt working

本文关键字：变量 不起作用 如果 PHP Javascript 语句      更新时间：2023-09-26

我的if(isset($_POST['height'])){只是直接进入else{}，这是什么原因？。因此，基本上假设检测div的高度。将其发送回PHP，在那里将其与1进行比较，并根据产品返回不同的语句。我想保留AJAX，这样我就可以检测div的高度，并将其发送到PHP if语句，而无需刷新页面。如果你知道发生了什么，我将不胜感激。爸爸保佑。

PHP

       <?php
    if(isset($_POST['height'])){
        $solo_height = $_POST['height'];
        if ($solo_height > 1){
            //HERE YOU SHOULD ECHO BACK A RESPONSE TO THE AJAX CALL                  
            echo '<div class="view_full_post">View Full Post</div>';
            // WHAT DOES $this->output($var); DO??? I HAVE NO CLUE...
            // SO JUST ECHO THE DIV JUST FOR TESTING...
        }else{
            echo "The Height is Less than a Thousand... What do we do sir???";
        }
    }
?>

Ajax

<script src="//ajax.googleapis.com/ajax/libs/jquery/1.11.0/jquery.min.js"></script>
        <script>
        (function ($) {
        $(document).ready(function(e) {
            view_height = $("#view_height").height();
            $.ajax({
                type: "POST",
                url: "index.php",  // POINTS TO THE PROCESSING FILE WE CREATED ABOVE
                data:{ height: view_height },
                success: function(data){
                    console.log(view_height);      // NOW YOU SHOULD BE ABLE TO GET A RESPONSE....
                    // UPDATE THE DIV THAT YOU WANTED TO...
                    // ==> HERE IS THE NEW UPDATE REFLECTING YOUR USE CASE:
                    // ==> ADD THE DIV RIGHT AT THE TOP OF THE BODY ELEMENT...
                },              
                error: function (jqXHR, textStatus, errorThrown) {
                    console.log('The following error occured: ' + textStatus, errorThrown);
                },
                complete: function (jqXHR, textStatus) {
                    console.log('The Request Round-Trip has successfully Completed... Happy Coding....');                   
                }
            });
        });
    })(jQuery);
        </script>

在同一目录中创建两个文件

file1.php

     <?php
    if(isset($_POST['height'])){
        $solo_height = $_POST['height'];
        if ($solo_height > 1){
            echo '<div class="view_full_post">View Full Post</div>';
        }else{
            echo "The Height is Less than a Thousand... What do we do sir???";
        }
    }
?>

index.php（带有html、body标记等）

.....
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.11.0/jquery.min.js"></script>
        <script>
        $(document).ready(function(e) {
            view_height = $("#view_height").height();
            $.ajax({
                type: "POST",
                url: "file1.php",  // POINTS TO THE PROCESSING FILE WE CREATED ABOVE
                data:{ height: view_height },
                success: function(data){
                    console.log(view_height); 
                    $('body').append('<h1>'+data+'</h1>');
                },              
                error: function (jqXHR, textStatus, errorThrown) {
                    console.log('The following error occured: ' + textStatus, errorThrown);
                },
                complete: function (jqXHR, textStatus) {
                    console.log('The Request Round-Trip has successfully Completed... Happy Coding....');                   
                }
            });
        });
        </script>
....
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