PHP另存为PDF不起作用
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【中文标题】PHP另存为PDF不起作用【英文标题】：PHP Save as PDF not working 【发布时间】：2016-10-11 06:03:29 【问题描述】：美好的一天！
我有一个下拉菜单，可以选择员工编号并根据该特定选择显示表格数据。我已另存为 pdf 代码，它将表格数据保存为 pdf。它工作正常，但我的表格列标题只显示不值。
我在一个包含 javascript 的文件中有下拉菜单，该文件被发送到显示我的表格的另一个文件。
以下是我所有文件的代码，以及到目前为止我为此尝试过的代码。
对于下拉菜单：
<?php
include("connect-db.php");
?>
<html>
<head>
<title>PHP insertion</title>
<link rel="stylesheet" href="css/insert.css" />
<link rel="stylesheet" href="css/navcss.css" />
<script>
function showUser(str)
if (str == "")
document.getElementById("txtHint").innerHTML = "";
return;
else
if (window.XMLHttpRequest)
// code for IE7+, Firefox, Chrome, Opera, Safari
xmlhttp = new XMLHttpRequest();
else
// code for IE6, IE5
xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
xmlhttp.onreadystatechange = function()
if (xmlhttp.readyState == 4 && xmlhttp.status == 200)
document.getElementById("txtHint").innerHTML = xmlhttp.responseText;
;
xmlhttp.open("GET","search_empnumber.php?emp_id="+str,true);
xmlhttp.send();
/*function showAssessories(acc)
if (acc == "")
document.getElementById("txtHint2").innerHTML = "";
return;
else
if (window.XMLHttpRequest)
// code for IE7+, Firefox, Chrome, Opera, Safari
xmlhttp = new XMLHttpRequest();
else
// code for IE6, IE5
xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
xmlhttp.onreadystatechange = function()
if (xmlhttp.readyState == 4 && xmlhttp.status == 200)
document.getElementById("txtHint2").innerHTML = xmlhttp.responseText;
;
xmlhttp.open("GET","getassessories.php?emp_id="+acc,true);
xmlhttp.send();
*/
</script>
</head>
<body>
<div class="maindiv">
<?php include("includes/head.php");?>
<?php include("menu.php");?>
<div class="form_div">
<form>
<div class="forscreen">
<h1>Search Records:</h1>
<p>You may search by Employee Number</p>
<select name="employeenumber" class="input" onchange="showUser(this.value)">
<option value="">Please Select Employee Number:</option>
</div>
<?php
$select_emp="SELECT distinct(emp_number) FROM employees";
$run_emp=mysql_query($select_emp);
while($row=mysql_fetch_array($run_emp))
$emp_id=$row['emp_id'];
$first_name=$row['first_name'];
$last_name=$row['last_name'];
$emp_number=$row['emp_number'];
$total_printers=$row['total_printers'];
$total_scanners=$row['total_scanners'];
$total_pc=$row['total_pc'];
$total_phones=$row['total_phones'];
$other_equips=$row['other_equips'];
?>
<option value="<?php echo $emp_number;?>"><?php echo $emp_number;?></option>
<?php ?>
</select>
<html>
</form>
</div>
<br>
<div id="txtHint"></div>
<br>
<div id="txtHint2"></div>
</div>
<?php include 'includes/foot.php';?>
</body>
</html>
下拉功能：onchange="showUser(this.value)"
function showUser(str)
if (str == "")
document.getElementById("txtHint").innerHTML = "";
return;
else
if (window.XMLHttpRequest)
// code for IE7+, Firefox, Chrome, Opera, Safari
xmlhttp = new XMLHttpRequest();
else
// code for IE6, IE5
xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
xmlhttp.onreadystatechange = function()
if (xmlhttp.readyState == 4 && xmlhttp.status == 200)
document.getElementById("txtHint").innerHTML = xmlhttp.responseText;
;
xmlhttp.open("GET","search_empnumber.php?emp_id="+str,true);
xmlhttp.send();
search_empnumber.php 文件：
<!DOCTYPE html>
<html>
<form action="search_empnumber.php" method="POST">
<input type="submit" value="SAVE AS PDF" class="btnPDF" name="submit" />
</form>
<head>
<style>
table
width: 100%;
border-collapse: collapse;
table, td, th
border: 1px solid black;
padding: 5px;
th text-align: left;
.link color:#00F; cursor:pointer;
</style>
</head>
<body>
<?php
//$emp_id =($_REQUEST['emp_id']);
$emp_id =($_REQUEST['emp_id']);
$count=1;
include("connect-db.php");
//$sql = "SELECT * from employees where department='".$department."'";
//$sql = "select * from employees as pg inner join accessories as pd on pg.emp_number= pd.emp_number ";
//$result = mysql_query($sql) or die(mysql_error());
//$result = mysql_query($query) or die(mysql_error());
//$emp_id =($_POST['employeenumber']);
$sql="SELECT * FROM employees WHERE emp_number = '".$emp_id."'";
$result = mysql_query($sql) or die(mysql_error());
$count=1;
echo "<table>
<tr>
<th>S.No</th>
<th>First Name</th>
<th>Last Name</th>
<th>Employee Number</th>
<th>Department</th>
<th>Email</th>
<th>Total Printers</th>
<th>Total Scanners</th>
<th>Total Pc</th>
<th>Total Phones</th>
<th>Other Equipments</th>
</tr>";
while($row = mysql_fetch_array($result))
echo "<tr>";
echo "<td>" . $count . "</td>";
echo "<td>" . $row['first_name'] . "</td>";
echo "<td>" . $row['last_name'] . "</td>";
echo "<td>" . $row['emp_number'] . "</td>";
echo "<td>" . $row['department'] . "</td>";
echo "<td>" . $row['email'] . "</td>";
echo "<td>" . $row['total_printers'] . "</td>";
echo "<td>" . $row['total_scanners'] . "</td>";
echo "<td>" . $row['total_pc'] . "</td>";
echo "<td>" . $row['total_phones'] . "</td>";
echo "<td>" . $row['other_equips'] . "</td>";
echo "</tr>";
$count++;
echo "</table>";
echo '<div class="forscreen">';
// echo '<br />';echo '<button class="btnPrint" type="submit" value="Submit" onclick="window.print()">Print</button>';
//echo '<input type="submit" value="SAVE AS PDF" class="btnPDFsearch" name="submit"/>';
// echo '<input type="submit" value="SAVE AS PDF" class="btnPDF" name="submit" />';
echo '</div>';
echo '<div class="forscreen">';
//echo '<br />';echo '<button class="btnPrevious" type="submit" value="Submit" onclick="history.back(); return false;">Previous Page</button>';
echo '</div>';
?>
</body>
</html>
PDF 代码（我试过）在 search_empnumber 的同一文件中：
<?php
error_reporting(E_ALL ^ E_DEPRECATED);
include('connect-db.php');
?>
<?php
//if($_POST['submit'])
if (isset($_POST['submit']))
require_once 'includes/practice.php';
$pdf->SetFont('times', '', 11);
$tb1 = '</br></br>
<table cellspacing="0" cellpadding="5" border="1">
<tr style="background-color:#f7f7f7;color:#333; ">
<td >First Name</td>
<td >Last Name</td>
<td >Employee Number</td>
<td >Department</td>
<td >Email</td>
<td >Total Printers</td>
<td >Total Scanners</td>
<td >Total PCs</td>
<td >Total Phones</td>
<td >Other Equipments</td>
</tr>
</table>';
include('connect-db.php');
//$emp_id =($_POST['emp_id']);
$emp_id =($_POST['employeenumber']);
$result1= mysql_query("SELECT * FROM employees where emp_number = '".$emp_id."'");
while($row = mysql_fetch_assoc($result1))
$tb2 = '<table cellspacing="0" cellpadding="5" border="1">
<tr>
<td >' . $row['first_name'] . '</td>
<td >' . $row['last_name'] . '</td>
<td >'. $row['emp_number'] .'</td>
<td >'.$row['department'].'</td>
<td >'.$row['email'].'</td>
<td >'.$row['total_printers'].'</td>
<td >'.$row['total_scanners'].'</td>
<td >'.$row['total_pc'].'</td>
<td >'.$row['total_phones'].'</td>
<td >'.$row['other_equips'].'</td>
</tr>
</table>';
$tb1 = $tb1.$tb2;
$pdf->writeHTML($tb1, true, false, false, false, '');
ob_end_clean();
$pdf->Output('Report.pdf', 'D');
?>
没有添加文件，即practice.php 和 pdf 库，因为它们只是以定义的格式创建表格
【问题讨论】：
试试 fpdf : fpdf.org Pdf 库不是问题。我已经在使用 tcpdf 目前还不是很清楚代码的哪一部分出错了。我在构建选择列表的部分看到了一些奇怪的东西。是这个问题吗？ @BenHillier PDF 生成的部分只是错误的。 PDF 已创建，但仅显示表列而不显示值。我认为查询是错误的 1) 我在结束</div> 时指出的问题仍然存在。您无法确定是否发送了任何内容 2) 您从未为 <form 标记指定 method，因此它可能会发送获取请求。然而你尝试将其作为$_POST 变量读回
【参考方案1】：
您混淆了GET 和POST。尝试以下一种（或两种）：
1) 在下拉代码中，将<form> 替换为：
<form method="POST">
2) 在表生成代码中，使用以下命令读回值：
$emp_id =($_REQUEST['employeenumber']);
还有：
if (isset($_REQUEST['submit']))
为了增加您的问题，在您发布的search_empnumber.php 的第一个版本中，您回读$emp_id =($_REQUEST['emp_id']);，而发布的值实际上是在$_REQUEST['employeenumber'] 中。
【讨论】：
对于 $emp_id =($_REQUEST['employeenumber']);它说，未定义的索引员工编号...【参考方案2】：我不知道您的哪一部分出了问题，但下拉代码中发生了一些奇怪的事情：
<select name="employeenumber" class="input" onchange="showUser(this.value)">
<option value="">Please Select Employee Number:</option>
</div> <!-- ISSUE: Closed a div which was never opened. You're lucky the select box even shows anything-->
<?php
$select_emp="SELECT distinct(emp_number) FROM employees";
$run_emp=mysql_query($select_emp);
//ISSUE: You loop through a lot of data, but then do nothing with it. With every pass of the loop, you simply change the variables, and nothing else. I think you meant to move your <option> into the loop
while($row=mysql_fetch_array($run_emp))
//ISSUE: You only selected 'emp_number' in your query. Most of these array keys are never filled
$emp_id=$row['emp_id'];
$first_name=$row['first_name'];
$last_name=$row['last_name'];
$emp_number=$row['emp_number']; //This is the only one filled
$total_printers=$row['total_printers'];
$total_scanners=$row['total_scanners'];
$total_pc=$row['total_pc'];
$total_phones=$row['total_phones'];
$other_equips=$row['other_equips'];
?>
<!--ISSUE: Only the last $emp_number from the query is filled. The rest you kept overwriting in your loop-->
<option value="<?php echo $emp_number;?>"><?php echo $emp_number;?></option>
<?php ?>
</select>
【讨论】：
这不是一个完整的下拉代码，我以为你会得到。不管怎样，我把它贴在那里。以上是关于PHP另存为PDF不起作用的主要内容，如果未能解决你的问题，请参考以下文章
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