如果使用 PHP 标签，PHP jquery 示例不起作用 - php jquery sample not working if php tags used

我正在测试一个弹出的jquery表单，

如果我把它放在一个文件弹出.php，

没有 <? ... ?> ，只是 HTML 如示例中，名为 php 工作正常

但是如果我使用<? ... ?>...它显示空白页，

所以我的文件弹出.php[显示空白]：：

<?php
<html lang="en">
<head>
  <meta charset="utf-8" />
  <title>jQuery UI Dialog - Modal form</title>
  <link rel="stylesheet" href="http://code.jquery.com/ui/1.10.3/themes/smoothness/jquery-ui.css" />
  <script src="http://code.jquery.com/jquery-1.9.1.js"></script>
  <script src="http://code.jquery.com/ui/1.10.3/jquery-ui.js"></script>
  <link rel="stylesheet" href="/resources/demos/style.css" />
  <style>
    body { font-size: 62.5%; }
    label, input { display:block; }
    input.text { margin-bottom:12px; width:95%; padding: .4em; }
    fieldset { padding:0; border:0; margin-top:25px; }
    h1 { font-size: 1.2em; margin: .6em 0; }
    div#users-contain { width: 350px; margin: 20px 0; }
    div#users-contain table { margin: 1em 0; border-collapse: collapse; width: 100%; }
    div#users-contain table td, div#users-contain table th { border: 1px solid #eee; padding: .6em 10px; text-align: left; }
    .ui-dialog .ui-state-error { padding: .3em; }
    .validateTips { border: 1px solid transparent; padding: 0.3em; }
  </style>
  <script>
  $(function() {
    var name = $( "#name" ),
      email = $( "#email" ),
      password = $( "#password" ),
      allFields = $( [] ).add( name ).add( email ).add( password ),
      tips = $( ".validateTips" );
    function updateTips( t ) {
      tips
        .text( t )
        .addClass( "ui-state-highlight" );
      setTimeout(function() {
        tips.removeClass( "ui-state-highlight", 1500 );
      }, 500 );
    }
    function checkLength( o, n, min, max ) {
      if ( o.val().length > max || o.val().length < min ) {
        o.addClass( "ui-state-error" );
        updateTips( "Length of " + n + " must be between " +
          min + " and " + max + "." );
        return false;
      } else {
        return true;
      }
    }
    function checkRegexp( o, regexp, n ) {
      if ( !( regexp.test( o.val() ) ) ) {
        o.addClass( "ui-state-error" );
        updateTips( n );
        return false;
      } else {
        return true;
      }
    }
    $( "#dialog-form" ).dialog({
      autoOpen: false,
      height: 300,
      width: 350,
      modal: true,
      buttons: {
        "Create an account": function() {
          var bValid = true;
          allFields.removeClass( "ui-state-error" );
          bValid = bValid && checkLength( name, "username", 3, 16 );
          bValid = bValid && checkLength( email, "email", 6, 80 );
          bValid = bValid && checkLength( password, "password", 5, 16 );
          bValid = bValid && checkRegexp( name, /^[a-z]([0-9a-z_])+$/i, "Username may consist of a-z, 0-9, underscores, begin with a letter." );
          // From jquery.validate.js (by joern), contributed by Scott Gonzalez: http://projects.scottsplayground.com/email_address_validation/
          bValid = bValid && checkRegexp( email, /^((([a-z]|'d|[!#'$%&''*'+'-'/='?'^_`{'|}~]|['u00A0-'uD7FF'uF900-'uFDCF'uFDF0-'uFFEF])+('.([a-z]|'d|[!#'$%&''*'+'-'/='?'^_`{'|}~]|['u00A0-'uD7FF'uF900-'uFDCF'uFDF0-'uFFEF])+)*)|(('x22)(((('x20|'x09)*('x0d'x0a))?('x20|'x09)+)?((['x01-'x08'x0b'x0c'x0e-'x1f'x7f]|'x21|['x23-'x5b]|['x5d-'x7e]|['u00A0-'uD7FF'uF900-'uFDCF'uFDF0-'uFFEF])|(''(['x01-'x09'x0b'x0c'x0d-'x7f]|['u00A0-'uD7FF'uF900-'uFDCF'uFDF0-'uFFEF]))))*((('x20|'x09)*('x0d'x0a))?('x20|'x09)+)?('x22)))@((([a-z]|'d|['u00A0-'uD7FF'uF900-'uFDCF'uFDF0-'uFFEF])|(([a-z]|'d|['u00A0-'uD7FF'uF900-'uFDCF'uFDF0-'uFFEF])([a-z]|'d|-|'.|_|~|['u00A0-'uD7FF'uF900-'uFDCF'uFDF0-'uFFEF])*([a-z]|'d|['u00A0-'uD7FF'uF900-'uFDCF'uFDF0-'uFFEF])))'.)+(([a-z]|['u00A0-'uD7FF'uF900-'uFDCF'uFDF0-'uFFEF])|(([a-z]|['u00A0-'uD7FF'uF900-'uFDCF'uFDF0-'uFFEF])([a-z]|'d|-|'.|_|~|['u00A0-'uD7FF'uF900-'uFDCF'uFDF0-'uFFEF])*([a-z]|['u00A0-'uD7FF'uF900-'uFDCF'uFDF0-'uFFEF])))'.?$/i, "eg. ui@jquery.com" );
          bValid = bValid && checkRegexp( password, /^([0-9a-zA-Z])+$/, "Password field only allow : a-z 0-9" );
          if ( bValid ) {
            $( "#users tbody" ).append( "<tr>" +
              "<td>" + name.val() + "</td>" +
              "<td>" + email.val() + "</td>" +
              "<td>" + password.val() + "</td>" +
            "</tr>" );
            $( this ).dialog( "close" );
          }
        },
        Cancel: function() {
          $( this ).dialog( "close" );
        }
      },
      close: function() {
        allFields.val( "" ).removeClass( "ui-state-error" );
      }
    });
    $( "#create-user" )
      .button()
      .click(function() {
        $( "#dialog-form" ).dialog( "open" );
      });
  });
  </script>
</head>
<body>
<div id="dialog-form" title="Create new user">
  <p class="validateTips">All form fields are required.</p>
  <form>
  <fieldset>
    <label for="name">Name</label>
    <input type="text" name="name" id="name" class="text ui-widget-content ui-corner-all" />
    <label for="email">Email</label>
    <input type="text" name="email" id="email" value="" class="text ui-widget-content ui-corner-all" />
    <label for="password">Password</label>
    <input type="password" name="password" id="password" value="" class="text ui-widget-content ui-corner-all" />
  </fieldset>
  </form>
</div>

<div id="users-contain" class="ui-widget">
  <h1>Existing Users:</h1>
  <table id="users" class="ui-widget ui-widget-content">
    <thead>
      <tr class="ui-widget-header ">
        <th>Name</th>
        <th>Email</th>
        <th>Password</th>
      </tr>
    </thead>
    <tbody>
      <tr>
        <td>John Doe</td>
        <td>john.doe@example.com</td>
        <td>johndoe1</td>
      </tr>
    </tbody>
  </table>
</div>
<button id="create-user">Create new user</button>

</body>
</html>
?>

我错过了什么？谢谢！

你已经将整个HTML页面封装在PHP标签中（旧样式 - 它们应该看起来像最新版本的PHP。您应该只将这些标签放在 PHP 代码周围，而不是 HTML 代码周围。

使用新的PHP标签（按照Rituraj的建议）
PHP标签之间的任何HTML/JS内容都需要通过使用"echo"或打印之类的东西打印在屏幕上

默认情况下

在新版本中以<?php ?>设置短代码<? ?>不起作用或继续设置以启用短代码

更新

我已经设置了一个演示，它正在工作，我认为文件链接

<link rel="stylesheet" href="/resources/demos/style.css" />

正在创建问题或看到您的 PHP 安装正确

让你的本地主机工作..？