web-development-server 相关问题

<?php // print_r($_POST); $error = ""; $successMessage = ""; if($_POST){ if(!$_POST["email"]){ $error .= "An email address is required.<br>"; } if(!$_POST["content"]){ $error .= "An content address is required.<br>"; } if(!$_POST["sub"]){ $error .= "An subject address is required.<br>"; } if($_POST['email'] && filter_var($_POST,FILTER_VALIDATE_EMAIL) === false ){ $error .= "The email is invalid.<br>"; } if($error != ""){ $error = '<div class="alert alert-danger" role="alert"><p><strong>There were error(s) in your form</strong></p>'.$error.'</div>'; } else{ $emailto = "[email protected]"; $subject = $_POST['sub']; $content = $_POST['content']; $headers = "From: ".$_POST['email']; if(mail($emailto,$sub,$content,$headers)){ $successMessage = '<div class="alert alert-success" role="alert">Your message was sent we\'ll get back to you ASAP.</div>'; } else{ $error = '<div class="alert alert-danger" role="alert"><p><strong>Your message couldn\'t be sent please try again!</div>'; } } } ?> <!doctype html> <html lang="en"> <head> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1"> <title>Bootstrap demo</title> <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/[email protected]/dist/css/bootstrap.min.css" integrity="sha384-GJzZqFGwb1QTTN6wy59ffF1BuGJpLSa9DkKMp0DgiMDm4iYMj70gZWKYbI706tWS" crossorigin="anonymous"> </head> <body> <div class="container"> <h1>Get in touch!</h1> <div id="error"><? echo $error.$successMessage; ?></div> <form method="post"> <div class="mb-3"> <label for="email" class="form-label">Email address</label> <input type="email" class="form-control" id="email" name="email" aria-describedby="emailHelp"> <div id="emailHelp" class="form-text">We'll never share your email with anyone else.</div> </div> <div class="mb-3"> <label for="subject" class="form-label">Subject</label> <input type="text" class="form-control" id="subject" name="sub"> </div> <div class="mb-3 form-check"> <input type="checkbox" class="form-check-input" id="exampleCheck1"> <label class="form-check-label" for="exampleCheck1">Check me out</label> </div> <div class="mb-3"> <label for="content" class="form-label">What would you like to ask us?</label> <textarea class="form-control" id="content" name="content" rows="3"></textarea> </div> <button type="submit" id="submit" class="btn btn-primary">Submit</button> </form> </div> <script src="https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous"></script> <script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/umd/popper.min.js" integrity="sha384-wHAiFfRlMFy6i5SRaxvfOCifBUQy1xHdJ/yoi7FRNXMRBu5WHdZYu1hA6ZOblgut" crossorigin="anonymous"></script> <script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/js/bootstrap.min.js" integrity="sha384-B0UglyR+jN6CkvvICOB2joaf5I4l3gm9GU6Hc1og6Ls7i6U/mkkaduKaBhlAXv9k" crossorigin="anonymous"></script>  </body> </html> 我创建了一个简单的表单，其中包含电子邮件、关于和主题字段以及一个提交按钮。当这些字段留空时，错误应该显示在屏幕顶部但错误没有出现。我已经注释掉了底部的 javascript 代码做同样的工作，但 PHP 代码不工作。有人可以帮我找出我的代码中的问题吗？

php jquery web-development-server web-deployment-project

回答 0 投票 0

我可以使用 Python 而不是 javascript 吗？

我想问我是否可以使用Python而不是Javascript我对Python感兴趣并且我是初学者级别的Web开发人员我想也许这是可能的？

javascript python web-development-server

回答 2 投票 0

我正在建立一个网站来可视化表格中的数据，如下所示：索引.html： Em...</desc> <question vote="0"> <p>我正在建立一个网站来可视化表格中的数据，如下所示：</p> <p>index.html:</p> <pre><code><!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>Employee Data</title>  <link rel="stylesheet" type="text/css" href="https://cdn.datatables.net/1.10.25/css/jquery.dataTables.min.css">  <style> body { font-family: Arial, sans-serif; font-size: 14px; } table { border-collapse: collapse; width: 100%; } th, td { text-align: left; padding: 8px; } th { background-color: #f2f2f2; font-weight: bold; } tr:nth-child(even) { background-color: #f2f2f2; } tr:hover { background-color: #ddd; } </style> </head> <body> <h1>Employee Data</h1> <table id="employee-table"> <thead> <tr> <th>Name</th> <th>Title</th> <th>Last Login</th> </tr> </thead> <tbody> <script src="data.js"></script> <script async> var employees = data; for (var i = 0; i < employees.length; i++) { var employee = employees[i]; var row = "<tr><td>" + employee.name + "</td><td>" + employee.title + "</td><td>" + employee.last_login + "</td></tr>"; document.write(row); } </script> </tbody> </table>  <script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>  <script type="text/javascript" src="https://cdn.datatables.net/1.10.25/js/jquery.dataTables.min.js"></script>  <script> $(document).ready(function() { $('#employee-table').DataTable({ "paging": true, "pageLength": 10 }); }); </script> </body> </html> </code></pre> <p>数据.js：</p> <pre><code>data = [ { "name": "John Smith", "title": "Marketing Manager", "last_login": "2023-04-12T08:30:00Z" }, { "name": "Sarah Johnson", "title": "Software Engineer", "last_login": "2023-04-13T15:45:00Z" }, { "name": "Michael Lee", "title": "Sales Representative", "last_login": "2023-04-10T10:00:00Z" }, { "name": "Emily Chen", "title": "Human Resources Manager", "last_login": "2023-04-14T09:15:00Z" }, { "name": "David Kim", "title": "Product Manager", "last_login": "2023-04-11T14:20:00Z" }, { "name": "Rachel Lee", "title": "Customer Support Specialist", "last_login": "2023-04-09T11:30:00Z" }, { "name": "Thomas Johnson", "title": "Financial Analyst", "last_login": "2023-04-10T16:15:00Z" }, { "name": "Melanie Davis", "title": "Project Manager", "last_login": "2023-04-13T12:45:00Z" }, { "name": "Daniel Kim", "title": "Software Developer", "last_login": "2023-04-12T09:00:00Z" }, { "name": "Jessica Lee", "title": "Marketing Coordinator", "last_login": "2023-04-14T08:00:00Z" }, { "name": "Kevin Park", "title": "IT Support Specialist", "last_login": "2023-04-11T17:30:00Z" }, { "name": "Hannah Kim", "title": "Sales Manager", "last_login": "2023-04-13T11:00:00Z" }, { "name": "Lucas Brown", "title": "Web Designer", "last_login": "2023-04-09T13:20:00Z" }, { "name": "Sophia Lee", "title": "Account Manager", "last_login": "2023-04-12T14:45:00Z" }, { "name": "Jacob Kim", "title": "Business Analyst", "last_login": "2023-04-11T10:00:00Z" }, { "name": "Olivia Lee", "title": "Graphic Designer", "last_login": "2023-04-13T09:00:00Z" }, { "name": "Ethan Park", "title": "Systems Administrator", "last_login": "2023-04-10T11:30:00Z" }, { "name": "Isabella Kim", "title": "Content Writer", "last_login": "2023-04-14T10:15:00Z" }, { "name": "William Lee", "title": "Operations Manager", "last_login": "2023-04-12T11:20:00Z" }, { "name": "Ava Kim", "title": "Social Media Manager", "last_login": "2023-04-13T08:30:00Z" }, { "name": "Emily Lee", "title": "Data Analyst", "last_login": "2023-02-15T05:20:54Z" }, { "name": "Brian Jones", "title": "Sales Representative", "last_login": "2023-03-30T22:14:45Z" }, { "name": "Jessica Wilson", "title": "Marketing Manager", "last_login": "2023-01-28T09:43:03Z" }, { "name": "Michael Miller", "title": "IT Support Specialist", "last_login": "2023-03-29T22:48:10Z" }, { "name": "John Anderson", "title": "Software Engineer", "last_login": "2023-02-26T12:29:31Z" }, { "name": "Kevin Davis", "title": "IT Support Specialist", "last_login": "2023-03-05T18:20:45Z" }, { "name": "Amanda Garcia", "title": "Marketing Manager", "last_login": "2023-02-26T08:38:18Z" }, { "name": "Sarah Brown", "title": "Sales Representative", "last_login": "2023-03-02T11:34:01Z" }, { "name": "David Davis", "title": "IT Support Specialist", "last_login": "2023-03-03T01:18:31Z" }, { "name": "Ashley Smith", "title": "Data Analyst", "last_login": "2023-02-18T17:59:11Z" }, { "name": "Emily Wilson", "title": "Software Engineer", "last_login": "2023-01-16T08:08:52Z" }, { "name": "Brian Smith", "title": "Marketing Manager", "last_login": "2023-02-21T09:52:46Z" }, { "name": "Jessica Johnson", "title": "Sales Representative", "last_login": "2023-02-18T08:30:36Z" }, { "name": "Michael Lee", "title": "IT Support Specialist", "last_login": "2023-01-11T23:02:57Z" }, { "name": "John Garcia", "title": "Data Analyst", "last_login": "2023-03-06T00:24:02Z" }, { "name": "Kevin Anderson", "title": "Software Engineer", "last_login": "2023-03-26T03:08:39Z" }, { "name": "Amanda Davis", "title": "Marketing Manager", "last_login": "2023-02-09T10:41:57Z" }, { "name": "Sarah Jones", "title": "Sales Representative", "last_login": "2023-01-23T15:28:48Z" }, { "name": "David Wilson", "title": "IT Support Specialist", "last_login": "2023-03-20T11:53:55Z" }, { "name": "Ashley Davis", "title": "Data Analyst", "last_login": "2023-01-26T05:49:22Z" }, { "name": "Emily Johnson", "title": "Software Engineer", "last_login": "2023-02-09T14:48:35Z" }, { "name": "Brian Lee", "title": "Marketing Manager", "last_login": "2023-02-08T04:46:09Z" }, { "name": "Jessica Anderson", "title": "Sales Representative", "last_login": "2023-03-02T20:14:13Z" }, { "name": "Michael Garcia", "title": "IT Support Specialist", "last_login": "2023-02-12T09:41:22Z" }, { "name": "John Smith", "title": "Data Analyst", "last_login": "2023-01-13T19:47:45Z" }, { "name": "Kevin Johnson", "title": "Software Engineer", "last_login": "2023-03-06T01:31:03Z" }, { "name": "Amanda Lee", "title": "Marketing Manager", "last_login": "2023-02-03T11:22:21Z" }, { "name": "Sarah Davis", "title": "Sales Representative", "last_login": "2023-03-14T20:11:12Z" }, { "name": "David Smith", "title": "IT Support Specialist", "last_login": "2023-02-07T18:31:27Z" }, { "name": "Ashley Johnson", "title": "Data Analyst", "last_login": "2023-02-05T17:10:38Z" } ] </code></pre> <p>问题一：但是数据是在 datatable.js 分页之前加载的。（我试过async，但我不知道该怎么做，所以所有数据仍然在datatable.js函数之前加载？）</p> <p>我不希望所有数据都在第一时间加载。我可能在代码中犯了错误/我的代码设计得不好..如果你能提出任何最佳/行业实践，我将不胜感激（我正在学习 MEAN/MERN 堆栈，将 datatable.js 与堆栈一起使用是行业惯例？）</p> </question> <answer tick="false" vote="0"> <p>我肯定会把你的 document.write 改成这样</p> <p>注意我更新了 tbody 但在完整表上调用了数据表</p> <pre><code>$(function() { $("#employee-table tbody") .html(data.map(employee => `<tr><td>${employee.name}</td><td>${employee.title}</td><td>${employee.last_login}</td></tr>`).join("")); $("#employee-table") .DataTable({ "paging": true, "pageLength": 10 }); }); </code></pre> <p></p><div data-babel="false" data-lang="js" data-hide="true" data-console="true"> <div> <pre><code>$(function() { $("#employee-table tbody") .html(data.map(employee => `<tr><td>${employee.name}</td><td>${employee.title}</td><td>${employee.last_login}</td></tr>`).join("")); $("#employee-table") .DataTable({ "paging": true, "pageLength": 10 }); });</code></pre> <pre><code>body { font-family: Arial, sans-serif; font-size: 14px; } table { border-collapse: collapse; width: 100%; } th, td { text-align: left; padding: 8px; } th { background-color: #f2f2f2; font-weight: bold; } tr:nth-child(even) { background-color: #f2f2f2; } tr:hover { background-color: #ddd; }</code></pre> <pre><code> <link rel="stylesheet" type="text/css" href="https://cdn.datatables.net/1.10.25/css/jquery.dataTables.min.css"> <h1>Employee Data</h1> <table id="employee-table"> <thead> <tr> <th>Name</th> <th>Title</th> <th>Last Login</th> </tr> </thead> <tbody> </tbody> </table>  <script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>  <script type="text/javascript" src="https://cdn.datatables.net/1.10.25/js/jquery.dataTables.min.js"></script>  <script> const data = [{ "name": "John Smith", "title": "Marketing Manager", "last_login": "2023-04-12T08:30:00Z" }, { "name": "Sarah Johnson", "title": "Software Engineer", "last_login": "2023-04-13T15:45:00Z" }, { "name": "Michael Lee", "title": "Sales Representative", "last_login": "2023-04-10T10:00:00Z" }, { "name": "Emily Chen", "title": "Human Resources Manager", "last_login": "2023-04-14T09:15:00Z" }, { "name": "David Kim", "title": "Product Manager", "last_login": "2023-04-11T14:20:00Z" }, { "name": "Rachel Lee", "title": "Customer Support Specialist", "last_login": "2023-04-09T11:30:00Z" }, { "name": "Thomas Johnson", "title": "Financial Analyst", "last_login": "2023-04-10T16:15:00Z" }, { "name": "Melanie Davis", "title": "Project Manager", "last_login": "2023-04-13T12:45:00Z" }, { "name": "Daniel Kim", "title": "Software Developer", "last_login": "2023-04-12T09:00:00Z" }, { "name": "Jessica Lee", "title": "Marketing Coordinator", "last_login": "2023-04-14T08:00:00Z" }, { "name": "Kevin Park", "title": "IT Support Specialist", "last_login": "2023-04-11T17:30:00Z" }, { "name": "Hannah Kim", "title": "Sales Manager", "last_login": "2023-04-13T11:00:00Z" }, { "name": "Lucas Brown", "title": "Web Designer", "last_login": "2023-04-09T13:20:00Z" }, { "name": "Sophia Lee", "title": "Account Manager", "last_login": "2023-04-12T14:45:00Z" }, { "name": "Jacob Kim", "title": "Business Analyst", "last_login": "2023-04-11T10:00:00Z" }, { "name": "Olivia Lee", "title": "Graphic Designer", "last_login": "2023-04-13T09:00:00Z" }, { "name": "Ethan Park", "title": "Systems Administrator", "last_login": "2023-04-10T11:30:00Z" }, { "name": "Isabella Kim", "title": "Content Writer", "last_login": "2023-04-14T10:15:00Z" }, { "name": "William Lee", "title": "Operations Manager", "last_login": "2023-04-12T11:20:00Z" }, { "name": "Ava Kim", "title": "Social Media Manager", "last_login": "2023-04-13T08:30:00Z" }, { "name": "Emily Lee", "title": "Data Analyst", "last_login": "2023-02-15T05:20:54Z" }, { "name": "Brian Jones", "title": "Sales Representative", "last_login": "2023-03-30T22:14:45Z" }, { "name": "Jessica Wilson", "title": "Marketing Manager", "last_login": "2023-01-28T09:43:03Z" }, { "name": "Michael Miller", "title": "IT Support Specialist", "last_login": "2023-03-29T22:48:10Z" }, { "name": "John Anderson", "title": "Software Engineer", "last_login": "2023-02-26T12:29:31Z" }, { "name": "Kevin Davis ", "title ": "IT Support Specialist ", "last_login": "2023-03-05T18:20:45Z" }, { "name ": "Amanda Garcia", "title": "Marketing Manager ", "last_login": "2023-02-26T08:38:18Z" }, { "name": "Sarah Brown", "title": "Sales Representative", "last_login": "2023-03-02T11:34:01Z" }, { "name": "David Davis", "title": "IT Support Specialist", "last_login": "2023-03-03T01:18:31Z" }, { "name": "Ashley Smith", "title": "Data Analyst", "last_login": "2023-02-18T17:59:11Z" }, { "name": "Emily Wilson", "title": "Software Engineer", "last_login": "2023-01-16T08:08:52Z" }, { "name": "Brian Smith", "title": "Marketing Manager", "last_login": "2023-02-21T09:52:46Z" }, { "name": "Jessica Johnson", "title": "Sales Representative", "last_login": "2023-02-18T08:30:36Z" }, { "name": "Michael Lee", "title": "IT Support Specialist", "last_login": "2023-01-11T23:02:57Z" }, { "name": "John Garcia", "title": "Data Analyst", "last_login": "2023-03-06T00:24:02Z" }, { "name": "Kevin Anderson", "title": "Software Engineer", "last_login": "2023-03-26T03:08:39Z" }, { "name": "Amanda Davis", "title": "Marketing Manager", "last_login": "2023-02-09T10:41:57Z" }, { "name": "Sarah Jones", "title": "Sales Representative", "last_login": "2023-01-23T15:28:48Z" }, { "name": "David Wilson", "title": "IT Support Specialist", "last_login": "2023-03-20T11:53:55Z" }, { "name": "Ashley Davis", "title": "Data Analyst", "last_login": "2023-01-26T05:49:22Z" }, { "name": "Emily Johnson", "title": "Software Engineer", "last_login": "2023-02-09T14:48:35Z" }, { "name": "Brian Lee", "title": "Marketing Manager", "last_login": "2023-02-08T04:46:09Z" }, { "name": "Jessica Anderson", "title": "Sales Representative", "last_login": "2023-03-02T20:14:13Z" }, { "name": "Michael Garcia", "title": "IT Support Specialist", "last_login": "2023-02-12T09:41:22Z" }, { "name": "John Smith", "title": "Data Analyst", "last_login": "2023-01-13T19:47:45Z" }, { "name": "Kevin Johnson", "title": "Software Engineer", "last_login": "2023-03-06T01:31:03Z" }, { "name": "Amanda Lee", "title": "Marketing Manager", "last_login": "2023-02-03T11:22:21Z" }, { "name": "Sarah Davis", "title": "Sales Representative", "last_login": "2023-03-14T20:11:12Z" }, { "name": "David Smith", "title": "IT Support Specialist", "last_login": "2023-02-07T18:31:27Z" }, { "name": "Ashley Johnson", "title": "Data Analyst", "last_login": "2023-02-05T17:10:38Z" } ] </script></code></pre> </div> </div> <p></p> </answer> <answer tick="false" vote="0"> <p>谢谢@mplungjan。 <a href="https://i.stack.imgur.com/d6hTR.png" target="_blank"><img src="https://cdn.imgupio.com/i/AWkuc3RhY2suaW1ndXIuY29tL2Q2aFRSLnBuZw==" alt="enter image description here"/></a> 他的剧本很好用。但抱歉，我没有足够的声誉来投票..</p> <p>我的最终代码是这样的：</p> <pre><code><!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>Employee Data</title>  <link rel="stylesheet" type="text/css" href="https://cdn.datatables.net/1.10.25/css/jquery.dataTables.min.css">  <style> body { font-family: Arial, sans-serif; font-size: 14px; } table { border-collapse: collapse; width: 100%; } th, td { text-align: left; padding: 8px; } th { background-color: #f2f2f2; font-weight: bold; } tr:nth-child(even) { background-color: #f2f2f2; } tr:hover { background-color: #ddd; } </style> </head> <body> <h1>Employee Data</h1> <table id="employee-table"> <thead> <tr> <th>Name</th> <th>Title</th> <th>Last Login</th> </tr> </thead> <tbody> </tbody> </table>  <script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>  <script type="text/javascript" src="https://cdn.datatables.net/1.10.25/js/jquery.dataTables.min.js"></script>  <script> $(function() { $("#employee-table tbody") .html(data.map(employee => `<tr><td>${employee.name}</td><td>${employee.title}</td><td>${employee.last_login}</td></tr>`).join("")); $("#employee-table") .DataTable({ "paging": true, "pageLength": 10 }); }); </script> <script src="data.js">const data = data;</script> </body> </html> </code></pre> </answer> </body></html>

javascript html json web web-development-server

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javascript reactjs web-development-server

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无法读取未定义的属性（读取“推”）TypeError：无法读取未定义的属性（读取“推”）

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javascript reactjs react-router frontend web-development-server

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