【发布时间】：2021-09-23 06:33:58
【问题描述】：
我正在尝试创建一个编辑页面，其中使用 PHP 从 MySQL 读取数据，然后以 HTML 格式显示。 像 VARCHAR 这样的普通字段可以正确显示，但我在显示 TEXT 字段时遇到了困难。
<?php
$DATABASE_HOST = '';
$DATABASE_USER = '';
$DATABASE_PASS = '';
$DATABASE_NAME = '';
mysqli_report(MYSQLI_REPORT_ERROR | MYSQLI_REPORT_STRICT);
$mysqli = mysqli_connect($DATABASE_HOST, $DATABASE_USER, $DATABASE_PASS, $DATABASE_NAME);
if ( mysqli_connect_errno() ) {
exit('Failed to connect to MySQL: ' . mysqli_connect_error());
}
$idjob = $_POST['jobID'];
$jobquery = $mysqli->prepare('SELECT * FROM jobs WHERE id = ?');
$jobquery->bind_param('s', $idjob); // 's' specifies the variable type => 'string'
$jobquery->execute();
$jobresult = $jobquery->get_result();
while ($row = $jobresult->fetch_assoc()) {
$jobtitle = $row['jobtitle'];
$workhours = $row['workhours'];
$type = $row['type'];
$availfrom = $row['availfrom'];
$deadline = $row['deadline'];
$customer = $row['customer'];
$province = $row['province'];
$town = $row['town'];
$minreq = $row['minreq'];
$posdetails = $row['posdetails'];
$minsal = $row['minsal'];
$maxsal = $row['maxsal'];
}
mysqli_free_result($jobresult);
mysqli_close($mysqli);
?>
<!DOCTYPE html>
<html lang="en">
<head>
<title>Edit Job Listing</title>
<link rel="shortcut icon" type="image/jpg" href="images/Logo.jpg">
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0 shrink-to-fit=no">
<meta http-equiv="X-UA-Compatible" content="IE=Edge,chrome=1">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css">
<link rel="stylesheet" href="../assets/css/style.css" type="text/css"/>
</head>
<body id="editjoblisting">
<!-- Container (About Add New Job Listing Section) -->
<div id="abouteditnewjob" class="container-fluid bg-grey">
<div class="row">
<div class="col-sm-2"></div>
<div class="col-sm-8">
<div class="text-center">
<h2> Edit Job Listing </h2>
</div>
</div>
<div class="col-sm-2"></div>
</div>
</div>
<div class="container-fluid bg-grey">
<form method="post" id="updedit_form" action="../php/updeditjob.php">
<div class="form-row">
<div class="col-sm-2"></div>
<div class="col-sm-4">
<div class="form-group">
<label for="jobtitle"> Job Title</label>
<input type="text" class="form-control" name="jobtitle" value='<?php echo $jobtitle; ?>'>
<label for="workhours"> Working Hours</label>
<input type="text" class="form-control" name="workhours" value='<?php echo $workhours; ?>'>
<label for="worktype">Type</label>
<select class="form-control" name="worktype" >
<option value='<?php echo $type; ?>' selected><?php echo $type; ?></option>
<option>--None--</option>
<option>Temporary</option>
<option>Permanent</option>
</select>
<label for="availfrom"> Available From</label>
<input type="date" class="form-control" id="availfrom" name="availfrom" required maxlength="50" value='<?php echo $availfrom; ?>'>
<label for="deadline"> Application Deadline</label>
<input type="date" class="form-control" id="deadline" name="deadline" required maxlength="50" value='<?php echo $deadline; ?>'>
</div>
</div>
<div class="col-sm-4">
<div class="form-group">
<label for="minreq">Minimum Requirements</label>
<textarea class="form-control" type="textarea" name="minreq" id="minreq" maxlength="6000" rows="5" value='<?php echo $minreq; ?>'></textarea>
<label for="posdetails">Position Details</label>
<textarea class="form-control" type="textarea" name="posdetails" id="posdetails" maxlength="6000" rows="5" value='<?php echo $posdetails; ?>'></textarea>
<label for="minsal"> Minimum Salary</label>
<input type="text" class="form-control" id="minsal" name="minsal" value='<?php echo $minsal; ?>'>
<label for="maxsal"> Maximum Salary</label>
<input type="text" class="form-control" id="maxsal" name="maxsal" value='<?php echo $maxsal; ?>'>
</div>
</div>
<div class="col-sm-2"></div>
</div>
</form>
</div>
</body>
</html>
这是我要显示/编辑的数据。
id "251"
jobid "ID#20101664"
jobtitle "SENIOR CONVEYANCING SECRETARY"
workhours "Monday - Friday 7:00 - 17:00"
type "Permanent"
availfrom "2021-06-07"
deadline "2021-10-29"
minreq
"- Matric Certificate
- Minimum 3 years experience
- Knowledge in Law programs (Lexis Nexis, Windeed) – Compulsory
- Knowledge of Bonds: Absa, Standard Bank, FNB and Nedbank
- Bilingual (English & Afrikaans)
- Computer literate
- Be accurate and methodical etc.." \N
minsal "0"
maxsal "0"
除了 minreq，它是 MySQL 中的一个 TEXT 字段之外，一切都很好。它没有显示出来，但是 echo 显示它是在 $row 数组中检索到的。
【问题讨论】：
-
警告！您对SQL injection attacks 开放！阅读how to prevent SQL injection in PHP，使用带有绑定参数的预准备语句，而不是将变量直接注入查询中。这不仅仅是安全问题。例如，如果您的数据包含单引号
'，您的查询将中断。 -
HTML textarea 没有
value- 将文本放在标签<textarea></textarea>之间 -
什么究竟不能使用那个单一的值？您尝试过什么来解决问题？
-
如果只有一行，为什么还要使用
while循环？ -
建议： 使用
mysqli_fetch_assoc()而不是mysqli_fetch_array()，您将能够通过列名（$row['title']等）获取值，这往往更易于阅读和管理。