我是一名 php 初学者，我正在努力创建一个留言簿页面，该页面将接受用户的姓名和电子邮件地址。他们提交表单后，脚本会将此数据写入文本文件。然后用户可以查看所有留言簿条目。这是我遇到问题的地方。
留言簿页面正在根据需要创建表格数据，但姓名和电子邮件部分未调用正确的数据。我正在使用 explode 方法，我认为那是我混淆自己并破坏程序的地方。我在这里查询并没有发现任何特定于此问题的内容。我还仔细阅读了文档，结果却让自己更加困惑。谁能告诉我哪里出错了？我在下面包含了这两个文件的源代码:
签名簿.php
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0
Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>Post Message</title>
<meta http-equiv="content-type"
content="text/html; charset=iso-8859-1" />
</head>
<body>
<?php
if (isset($_POST['submit'])) {
$Name = stripslashes($_POST['name']);
$Email = stripslashes($_POST['email']);
$Name = str_replace("~", "-", $Name);
$Email = str_replace("~", "-", $Email);
$MessageRecord = "$Name~$Email\n";
$MessageFile = fopen("Guestbook/messages.txt", "ab");
if ($MessageFile === FALSE)
echo "There was an error saving your
entry.\n";
else {
fwrite($MessageFile, $MessageRecord);
fclose($MessageFile);
echo "Thank you for signing the Guest Book!\n";
}
}
?>
<h1>Please Sign the Guest Book</h1>
<hr />
<form action="sign-book.php" method="POST">
<span style="font-weight:bold">Name:</span>
<input type="text" name="name" />
<span style="font-weight:bold">Email:</span>
<input type="text" name="email" /><br /><br />
<input type="submit" name="submit"
value="Sign Guest Book" />
<input type="reset" name="reset"
value="Reset Form" />
</form>
<hr />
<p>
<a href="guestbook.php">View Previous Entries</a>
</p>
</body>
</html>
留言本.php
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0
Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>Message Board</title>
<meta http-equiv="content-type"
content="text/html; charset=iso-8859-1" />
</head>
<body>
<h1>Our Guestbook</h1>
<?php
if (isset($_GET['action'])) {
if ((file_exists(
"Guestbook/messages.txt")) &&
(filesize(
"Guestbook/messages.txt") != 0)) {
$MessageArray = file(
"Guestbook/messages.txt");
switch ($_GET['action']) {
case 'Delete Message':
if (isset($_GET['message'])) {
$Index = $_GET['message'];
unset($MessageArray[$Index]);
$MessageArray = array_values($MessageArray);
}
break;
case 'Remove Duplicates':
$MessageArray = array_unique($MessageArray);
$MessageArray = array_values($MessageArray);
break;
case 'Sort Ascending':
sort($MessageArray);
break;
case 'Sort Descending':
rsort($MessageArray);
break;
}
if (count($MessageArray)>0) {
$NewMessages = implode($MessageArray);
$MessageStore = fopen("Guestbook/messages.txt", "wb");
if ($MessageStore === false)
echo "There was an error
updating the message
file\n";
else {
fwrite($MessageStore,
$NewMessages);
fclose($MessageStore);
}
} else
unlink("Guestbook/messages.txt");
}
}
if ((!file_exists("Guestbook/messages.txt"))
|| (filesize("Guestbook/messages.txt")
== 0))
echo "<p>There are no entries
logged.</p>\n";
else {
$MessageArray = file("Guestbook/messages.txt");
echo "<table
style=\"background-color:lightgray\"
border=\"1\" width=\"100%\">\n";
$count = count($MessageArray);
for ($i = 0; $i < $count; ++$i) {
$CurrMsg = explode("~", $MessageArray[$i]);
$KeyArray[] = $CurrMsg[0];
$ValueArray[] = $CurrMsg[1];
$KeyMessageArray = array_combine($KeyArray, $ValueArray);
}
$Index = 1;
foreach($KeyMessageArray as $Message) {
$CurrMsg = explode("~", $Message);
echo "<tr>\n";
echo "<td width=\"5%\"
style=\"text-align:center\"><span
style=\"font-weight:bold\">" .
$Index . "</span></td>\n";
echo "<td width=\"85%\"><span
style=\"font-weight:bold\">
Name:</span> " .
htmlentities($KeyArray[1]) . "<br />";
echo "<span style=\"font-weight:bold\">
Email:</span> " . htmlentities($CurrMsg[0]) .
"<br />";
echo "<td width=\"10%\"
style=\"text-align:center\">" .
"<a href='guestbook.php?" .
"action=Delete%20Message&" .
"message=" . ($Index - 1) .
"'>Delete This Entry</a>" .
"</td>\n";
echo "</tr>\n";
++$Index;
next($KeyMessageArray);
}
echo "</table>\n";
}
?>
<p>
<a href="sign-book.php">
Log Another Entry</a><br />
<a href="guestbook.php?action=Sort%20Ascending">
Sort Subjects A-Z</a><br />
<a href="guestbook.php?action=Sort%20Descending">
Sort Subjects Z-A</a><br />
<a href="guestbook.php?action=Remove%20Duplicates">
Remove Duplicate Messages</a><br />
</p>
</body>
</html>
最佳答案
你已经通过~在这里展开了$MessageArray[$i]:
for ($i = 0; $i < $count; ++$i) {
$CurrMsg = explode("~", $MessageArray[$i]);
$KeyArray[] = $CurrMsg[0];
$ValueArray[] = $CurrMsg[1];
$KeyMessageArray = array_combine($KeyArray, $ValueArray);
}
所以，现在您在 $KeyArray 中拥有所有姓名，在 $ValueArray 中拥有所有电子邮件。
(顺便说一下 - 如果你的名字会被重复，例如 Paul, Paul, John - 糟糕)
尽管如此，接下来你要做的是:
foreach($KeyMessageArray as $Message) {
$CurrMsg = explode("~", $Message);
但为什么要这样做，因为 $Message 已经是一封电子邮件，而且里面绝对没有 ~!
你应该这样使用foreach:
foreach($KeyMessageArray as $name => $email) {
// do stuff
}
更新关于名称:
所以，正如我所说，当您的名字重复时，您的代码将无法按预期工作。为避免这种情况 - 不要使用名称作为键，只需使用名称和电子邮件作为数组的值:
for ($i = 0; $i < $count; ++$i) {
$CurrMsg = explode("~", $MessageArray[$i]);
// add both values to array:
$KeyMessageArray[] = array(
'name' => $CurrMsg[0],
'email' => $CurrMsg[1],
);
}
// next - iterate:
foreach($KeyMessageArray as $data) {
echo 'name is ' . $data['name'] . ', email is ' . $data['email'];
// do stuff
}
甚至更进一步 - 您可以在一个循环中完成所有事情:
for ($i = 0; $i < $count; ++$i) {
$CurrMsg = explode("~", $MessageArray[$i]);
echo 'name is ' . $CurrMsg[0] . ', email is ' . $CurrMsg[1];
// show some table stuff
}
关于php - 初学者使用 php 创建留言簿，将信息记录到文本文件并在单独的页面上显示数据，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/32936770/