我在php中制作了一个简单的留言板脚本。我几乎完成了它，但需要帮助在我的代码中找到逻辑错误。一个是在回应表单内容的结果时。我想在不同的行上显示电子邮件，全名和评论。
像这样email: some@email.com
Name: joe somebody
Comment:
hello world.
但由于某种原因，它只显示所有行的名字和姓氏。
其他3个问题是排序（升序，降序）和删除重复项。
提前感谢您就如何解决此问题提出建议。
我只是问你详细，所以我知道你在说什么。
在任何情况下，都是代码：
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Guest Book</title>
</head>
<body>
<?php
// is there data in the fields
if (isset($_POST['submit'])){
$firstName = addslashes($_POST['first_name']);
$lastName = addslashes($_POST['last_name']);
$wholeName = $firstName . "," . $lastName;
$email = addslashes($_POST['email']);
$comment = addslashes($_POST['comment']);
$guestRecord = "$wholeName~$email~$comment\n";
$guestBook = fopen("guestbook.txt", "ab");
//if not let the user know
if ($guestBook === FALSE)
echo "There was an error saving your entry!\n";
else {
// if there is info add it to the txt file
fwrite($guestBook, $guestRecord);
// close the txt file
fclose($guestBook);
//let the user know info was saved
echo "Your entry has been saved.\n";
}
}
?>
<h2>Enter your name to sign our guest book</h2>
<hr>
<form method="POST" action ="GuestBook1.php">
<p>First Name<input type ="text" name="first_name"/></p>
<p>Last Name<input type ="text" name="last_name"/></p>
<p>Email<input type ="text" name="email"/></p>
<p><textarea name="comment" id="comment"/></textarea></p>
<p><input type ="submit" value ="Submit" name="submit"/></p>
</form>
<hr>
<p><a href ="GuestBook.php">Show Guest Book</a>
<br />
<a href="GuestBook.php?action=Delete%20First">Delete Guest Entry</a>
<br />
<a href="GuestBook.php?action=Remove%20Duplicates">Remove Duplicate Entries</a>
<br />
<a href="GuestBook.php?action=Sort%20Ascending">Sort Entries A-Z</a>
<br />
<a href="GuestBook.php?action=Sort%20Descending">Sort Entries Z-A</a>
<br />
</p>
<?php
// if theres info in the form process info
if (isset($_GET['submit'])) {
if ((file_exists("guestbook.txt")) &&
(filesize("guestbook.txt") != 0)) {
$guestArray = file("guestbook.txt");
//switch to $_Get Method
switch ($_GET['submit']) {
// remove duplicate entries
case 'Remove Duplicates':
$guestArray = array_unique($guestRecord);
$guestArray = array_values($guestRecord);
break;
//sort ascending
case 'Sort Ascending':
$guestArray = sort($guestArray);
break;
//sort Decending
case 'Sort Decending':
$guestArray = ksort($guestArray);
break;
}
//count to see how many entries there are
if (count($guestArray)>0) {
$newGuest = implode($guestArray);
$guestStore = fopen("guestbook.txt", "ab");
if ($guestStore === false)
echo "There was an error updating the message file\n";
else {fwrite($guestStore, $newGuest);
fclose($guestStore);
}
}
else
unlink("guestbook.txt");}
}
if ((!file_exists("guestbook.txt")) ||
(filesize("guestbook.txt") == 0))
echo "<p>There are no entries.</p>\n";
else {
// there isnt anything in the txt file show an error
if ((!file_exists("guestbook.txt")) ||
(filesize("guestbook.txt") == 0))
echo "<p>There are no entries.</p>\n"; else {
//if there is information display the txt file in a table
$guestArray = file("guestbook.txt");
echo "<table style=\"background-color:lightgray\"
border=\"1\" width=\"100%\">\n";
//begin counting number of guest entries
$count = count($guestArray);
for ($i = 0; $i < $count; ++$i) {
$currMsg = explode("~", $guestArray[$i]);
// display results in a table
echo "<td width=\"5%\" style=\"text-align:center;
font-weight:bold\">" . ($i + 1) . "</td>\n";
echo "<td width=\"95%\"><span style=\"font-weight:bold\">
Email:</span> " . htmlentities($currMsg[0]) . "<br />\n";
echo "<span style=\"font-weight:bold\">Name:</span> " .
htmlentities($currMsg[0]) . "<br />\n";
echo "<span style=\"text-decoration:underline;
font-weight:bold\">Comment</span><br />\n" .
htmlentities($currMsg[0]) .
"</td>\n";
echo "</tr>\n";
}
echo "</table>\n";
}
}
?>
</body>
</html>
答案 0 :(得分：0)
$firstName = addslashes($_POST['first_name'])."\r\n";
\r\n\会将物理上的东西放在新的一行上。确保使用双引号。
答案 1 :(得分：-1)
关于您的第一个问题，您正在回复所有字段的$currMsg[0]。您需要为每个值使用正确的索引（名称为0，电子邮件为1，评论为2。甚至更好，使用类似的东西：
list($name, $email, $comment) = explode("~", $guestArray[$i]);
这样你就有了有意义的变量名。
您需要更具体地了解其他问题，以及您当前的代码无法正常工作的方式。
我可以看到至少一个问题 - 您的链接有?action=，但您的switch语句正在查看$_GET['submit']，而不是$_GET['action']。另外，您在case 'Sort Decending':（缺少's'）中输入错字