我查看了这方面的相关帖子,看到一个现在让我认为我做错了的帖子。 我对PHP非常非常陌生,但愿意学习。
我需要有一个索引.php表单,其中包含学生姓名的输入框,学生编号的输入框和课程下拉列表。
我的PHP脚本不允许包含数据 - 数据必须从非可选的.txt文件中检索。
我有课程.txt有四个课程名称,每个课程都有自己独特的课程代码和可以注册的最大人数。 课程内容.txt:动画电影设计:AFD-250:6数字雕塑:DS-410:4动画历史:HA-240:6视觉效果:VE-298:4
我有课程final.txt它已转换为逗号分隔的文件。 课程内容期末.txt:动画电影设计,AFD-250,6数字雕塑,DS-410,4动画史,HA-240,6视觉效果,VE-298,4
目前,两个输入框工作正常。 我的问题是下拉列表。 我希望它显示课程名称,然后显示空格,然后显示课程代码。 此时,它仅显示课程代码。 我也不明白为什么它显示第二个数据字段。
谢谢。
索引.php代码...
<?php
// Convert courses.txt file to comma delimited file coursesfinal.txt
$in = "courses.txt";
$out = "coursesfinal.txt";
$IN = fopen ($in, 'r') or die ("$in cannot be opened for reading.");
$OUT = fopen ($out, 'w') or die ("$out cannot be opened for writing.");
if (flock($OUT, LOCK_EX)) {
while ($inline = fgets ($IN) ) {
$splitarray = explode (":", $inline);
$outline = implode(",", $splitarray);
fputs ($OUT, $outline);
}
flock($OUT, LOCK_UN);
}
fclose ($IN);
fclose ($OUT);
// Search coursesfinal.txt file for course to match user input
$datafile = "coursesfinal.txt";
// If selection has been made, find a match
if (isset ($_POST['courses'])) {
$courses = strip_tags ($_POST['']);
$DB = fopen ($datafile, 'r') or die ("$datafile cannot be opened for reading.");
$found = FALSE;
while ($record = fgets ($DB) and ! $found) {
$field = explode (",", htmlentities (trim ($record)));
$found = $courses === $field[0];
}
fclose ($DB);
if ($found) {
echo "<p>You have selected: $field[0] $field[1]</p>n";
}
}
?>
<html>
<head>
<title>Registration Form</title>
<style>
body{background-color: #ffffe6; width:610px;}
h1 {color: #29a3a3;}
.inputbox {padding: 7px; border: #F0F0F0 2px solid; border-radius: 4px;}
.btn {padding: 10px;background-color: #29a3a3; border: solid thin #000000; color: #FFF; font-weight: bolder; cursor: pointer;}
</style>
</head>
<body>
<h1>Course Registration</h1>
<form method="post" action="index.php">
<fieldset><legend><strong>Student Information</strong></legend>
<dl>
<dt>Student Name:</dt>
<dd><input class="inputbox" name="studentname" type="text" id="studentname" required autofocus placeholder="Please enter your first and last name" tabindex="10" size="50"></dd>
<br>
<br>
<dt for="number">Student Number:</dt>
<dd><input class="inputbox" name="studentnumber" type="text" required id="studentnumber" placeholder="Please enter using the following format: PX-03-046" tabindex="20" size="50"></dd>
</dl>
<br>
</fieldset>
<br>
<fieldset><legend><strong>Available Courses</strong></legend>
<br>
Select a Course: <select name="course">
<option value="-1" selected>Select From...</option>
<?php
// Generate the form
$DB = fopen ($datafile, 'r') or die ("$datafile cannot be opened for reading.");
while ($record = fgets ($DB) ) {
$field = explode (",", htmlentities (trim ($record)));
echo " <option value="$field[0]">$field[1]</option>n";
}
fclose ($DB);
echo " </select>n";
?>
<br>
<br>
<br>
<br>
<br>
<br>
</fieldset>
<div>
<p>
<input name="reset" type="reset" tabindex="40" value="Clear Form" class="btn">
<input name="submit" type="submit" tabindex="50" value="Submit Form" class="btn">
</p>
</div>
</form>
</body>
</html>
请参阅以下代码:
while ($record = fgets ($DB) ) {
$field = explode (",", htmlentities (trim ($record)));
echo " <option value="$field[0]">$field[1]</option>n";
}
如果您使用一个参数调用fgets()
,它会继续读取,直到找到换行符或 EOF(以先到者为准)。确保课程最终的格式.txt例如:
Animation Film Design,AFD-250
6 Digital Sculpture,DS-410
4 History of Animation,HA-240,
6 Visual Effects,VE-298
然后你可以
while ($record = fgets ($DB) ) {
$field = explode (",", htmlentities (trim ($record)));
echo " <option value="$field[1]">$field[0] $field[1]</option>n";
}
请注意,带有逗号分隔符的explode()
会将字符串"动画电影设计,AFD-250"拆分为数组
$field[0] == "Animation Film Design"
$field[1] == "AFD-250"