使用 PHP 设置页面标题
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Set Page Title using PHP
提问by Mayur Shah
I wish to set the title of my webpage to Ultan.me - Whatever the post title. I want it to display the post title. The posts are submitted to a MySQL database and the title row is called "title". Any help is appreciated with this small question.
我希望将我的网页标题设置为 Ultan.me -无论帖子标题如何。我希望它显示帖子标题。帖子被提交到 MySQL 数据库，标题行被称为“标题”。对于这个小问题，任何帮助表示赞赏。
Update:
更新：
Here is the page itself now but it doesn't display the title. Should I open the php document and connect to my database somewhere different to it's current locations?
这是页面本身，但它不显示标题。我应该打开 php 文档并连接到与当前位置不同的数据库吗？
The Code (The only necessary piece is the beginning):
代码（唯一需要的部分是开头）：
<html>
<head>
<meta name="keywords" content="Mac user Ultan Casey TheCompuGeeks UltanKC">
<title>Ultan.me - <?echo $title;?></title>
<link rel="stylesheet" href="css/styles.css" type="text/css" />
<script type="text/javascript"
src="http://ajax.googleapis.com/ajax/libs/jquery/1.2.6/jquery.min.js"></script>
<script type="text/javascript"
src="js/jquery.labelify.js"></script>
<script type="text/javascript">
$(document).ready(function(){
$(":text").labelify();
});
</script>
<style>
a {text-decoration:none}
</style>
</head>
<body>
<div id="main">
<!-- Menu Start -->
<div id="menu">
<ul>
<li><a href="index.php">home</a></li>
<li><a href="index.php">about me</a></li>
<li><a href="index.php">archives</a></li>
<li><a href="index.php">contact</a></li>
<li><a href="index.php">gallery</a></li>
</ul>
</div>
<!-- Menu End -->
<img src="images/banner.png" />
<div id="content">
<div id="posts">
<?php
mysql_connect ('localhost', 'root', 'root') ;
mysql_select_db ('ultankc');
if (!isset($_GET['id']) || !is_numeric($_GET['id'])) {
die("Invalid ID specified.");
}
$id = (int)$_GET['id'];
$sql = "SELECT * FROM php_blog WHERE id='$id' LIMIT 1";
$result = mysql_query($sql) or print ("Can't select entry from table php_blog.<br />" . $sql . "<br />" . mysql_error());
while($row = mysql_fetch_array($result)) {
$date = date("l F d Y", $row['timestamp']);
$title = stripslashes($row['title']);
$entry = stripslashes($row['entry']);
$get_categories = mysql_query("SELECT * FROM php_blog_categories WHERE `category_id` = $row[category]");
$category = mysql_fetch_array($get_categories);
?>
<p><?php echo "<p id='post-title'><strong><a href=\"post.php?id=". $id . "\">" . $title . "</a></strong></p>"; ?><br /><br />
<div id="entry"><?php echo $entry; ?>
</div><br /><br />
<p id="date">Posted in <a href="category.php?category=<?php echo $row['category']; ?>"><?php echo $category['category_name']; ?></a> on <?php echo $date; ?></p>
</p>
<h2 id="share-title">Share This Post</h2>
<div id="social-share">
<li id="link-right"><a href="http://twitter.com/home?status=
I just read <?php echo $title; ?> at http://ultan.me/post.php?id=<?php echo $id; ?>"><center>Twitter</center></a></li>
<li id="link-left"><a href="http://digg.com/submit?url=http://ultan.me/post.php?id=<?php echo $id; ?>"><center>Digg</center></a></li>
<br>
<li id="link-right"><a href="http://www.facebook.com/sharer.php?u=http://ultan.me/post.php?id=<?php echo $id; ?>&t=<?php echo $title; ?>"><center>Facebook</center></a></li>
<li id="link-left"><a href="http://www.google.com/buzz/post?url=http://ultan.me/post.php?id=<?php echo $id; ?>
"><center>Google Buzz</center></a></li>
<div class="clr"></div>
</div>
<h2 id="comments-title">Comments</h2>
<div id="comment-list">
<?php
}
$commenttimestamp = strtotime("now");
$sql = "SELECT * FROM php_blog_comments WHERE entry='$id' ORDER BY timestamp";
$result = mysql_query ($sql) or print ("Can't select comments from table php_blog_comments.<br />" . $sql . "<br />" . mysql_error());
while($row = mysql_fetch_array($result)) {
$timestamp = date("l F d Y", $row['timestamp']);
printf("<div class='comment-ind'><p id='comments'><a id='username' href=\"%s\">%s</a> %s</p>", stripslashes($row['url']), stripslashes($row['name']), $timestamp);
print("<p class='comments'>" . stripslashes($row['comment']) . "</p><div class='clr'><br></div></div>");
}
?>
<div class="clr"></div>
<form id="commentform" method="post" action="process.php">
<p><input type="hidden" name="entry" id="entry" value="<?php echo $id; ?>" />
<input type="hidden" name="timestamp" id="timestamp" value="<?php echo $commenttimestamp; ?>">
<input type="text" name="name" id="name" title="Name (required)" /><br />
<input type="text" name="email" id="email" title="Mail (will not be published) (required)" /><br />
<input type="text" name="url" id="url" title="Website" value="http://" /><br />
<br />
<textarea title="Your Comment Goes Here" name="comment" id="comment"></textarea></p>
<p><input type="submit" name="submit_comment" id="submit_comment" value="Add Comment" /></p>
</form>
</div>
<div id="pages">
<?php
$total_results = mysql_fetch_array(mysql_query("SELECT COUNT(*) AS num FROM php_blog"));
$total_pages = ceil($total_results['num'] / $blog_postnumber);
if ($page > 1) {
$prev = ($page - 1);
echo "<a href=\"?page=$prev\"><< Newer</a> ";
}
for($i = 1; $i <= $total_pages; $i++) {
if ($page == $i) {
echo "$i ";
}
else {
echo "<a href=\"?page=$i\">$i</a> ";
}
}
if ($page < $total_pages) {
$next = ($page + 1);
echo "<a href=\"?page=$next\">Older >></a>";
}
?>
</div>
</div>
</div>
<!-- Sidebar Start -->
<div class="sidebar">
<!-- Item 1 -->
<div id="side-item">
<h2>
<a href="http://www.dailybooth.com/UltanCasey">
<img src="images/db-icon.jpg">Dailybooth
</a></h2>
<div id="side-item-content">
<center>
<img src="http://dailybooth.com/UltanCasey/latest/medium.jpg" />
</center>
</div>
</div>
<!-- Item 2 -->
<div id="side-item">
<h2><img src="images/connect.jpg" />Connect</h2>
</div>
<div id="side-item-content">
<div class="tweet-title"><p><a href="http://www.twitter.com/UltanKc">Latest Tweet:</a></p></div>
<div id="tweet">
<?php
function getTwitterStatus($userid){
$url = "http://twitter.com/statuses/user_timeline/$userid.xml?count=1";
function auto_link_twitter ($text)
{
// properly formatted URLs
$urls = "/(((http[s]?:\/\/)|(www\.))?(([a-z][-a-z0-9]+\.)?[a-z][-a-z0-9]+\.[a-z]+(\.[a-z]{2,2})?)\/?[a-z0-9._\/~#&=;%+?-]+[a-z0-9\/#=?]{1,1})/is";
$text = preg_replace($urls, " <a href=''></a>", $text);
// URLs without protocols
$text = preg_replace("/href=\"www/", "href=\"http://www", $text);
// Twitter usernames
$twitter = "/@([A-Za-z0-9_]+)/is";
$text = preg_replace ($twitter, " <a href='http://twitter.com/'>@</a>", $text);
// Twitter hashtags
$hashtag = "/#([A-Aa-z0-9_-]+)/is";
$text = preg_replace ($hashtag, " <a href='http://hashtags.org/'>#</a>", $text);
return $text;
}
$xml = simplexml_load_file($url) or die("could not connect");
foreach($xml->status as $status){
$text = $status->text;
}
echo auto_link_twitter ($text);
}
getTwitterStatus("UltanKC");
?>
</div>
<br>
<ul>
<li id="social"><a href="#">YouTube</a></li>
<li id="social"><a href="#">Twitter</a></li>
<li id="social"><a href="#">LastFM</a></li>
<li id="social"><a href="#">Email</a></li>
</ul>
</div>
<!-- Item 2 End-->
<div id="side-item">
<h2><img src="images/archive.jpg" />Archives</h2>
</div>
<div id="archive-side">
<?php
mysql_connect ('localhost', 'root', 'root') ;
mysql_select_db ('ultankc');
$result = mysql_query("SELECT FROM_UNIXTIME(timestamp, '%Y') AS get_year, COUNT(*) AS entries FROM php_blog GROUP BY get_year");
while ($row = mysql_fetch_array($result)) {
$get_year = $row['get_year'];
$entries = $row['entries'];
echo "<li id='tag'><a href=\"archives.php?year=" . $get_year . "\">Entries from " . $get_year . " (" . $entries . ")<br /></a></li>";
}
$result1 = mysql_query("SELECT * FROM php_blog_categories ORDER BY category_name ASC");
while($row = mysql_fetch_array($result1)) {
$result2 = mysql_query("SELECT COUNT(`id`) AS entries FROM php_blog WHERE category = $row[category_id]");
$num_entries = mysql_fetch_array($result2);
echo '<li id="tag"><a href="category.php?category=' . $row['category_id'] . '">' . $row['category_name'] . ' (' . $num_entries['entries'] . ')</a></li>';
}
?>
</div>
</div>
<div class="clr" />
</div>
<!-- Sidebar End -->
<div id="footer">
<p> © Ultan Casey 2010</p>
<p style="margin-top: -18px; float:right"><a href="index.php">Home</a> | <a href="about.php">About Me</a> | <a href="mailto:[email protected]">Email Me</a></p>
</div>
</div>
</div>
</body>
</html>
?>
回答by Mayur Shah
Here's the method I use (for similar things, not just title):
这是我使用的方法（对于类似的事情，而不仅仅是标题）：
<?
ob_start (); // Buffer output
?>
<!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" xml:lang="en">
<head>
<title><!--TITLE--></title>
</head>
<body>
<?
$pageTitle = 'Title of Page'; // Call this in your pages' files to define the page title
?>
</body>
</html>
<?
$pageContents = ob_get_contents (); // Get all the page's HTML into a string
ob_end_clean (); // Wipe the buffer
// Replace <!--TITLE--> with $pageTitle variable contents, and print the HTML
echo str_replace ('<!--TITLE-->', $pageTitle, $pageContents);
?>
PHP usually works be executing any bits of code and printing all output directly to the browser. If you say "echo 'Some text here.';", that string will get sent the browser and is emptied from memory.
PHP 通常可以执行任何代码位并将所有输出直接打印到浏览器。如果您说"echo 'Some text here.';"，该字符串将被发送到浏览器并从内存中清空。
What output buffering does is say "Print all output to a buffer. Hold onto it. Don't send ANYTHING to the browser until I tell you to."
输出缓冲的作用是说“将所有输出打印到缓冲区。坚持下去。在我告诉你之前不要向浏览器发送任何东西。”
So what this does is it buffers all your pages' HTML into the buffer, then at the very end, after the tag, it uses ob_get_contents () to get the contents of the buffer (which is usually all your page's HTML source code which would have been sent the browser already) and puts that into a string.
所以它的作用是将你所有页面的 HTML 缓冲到缓冲区中，然后在最后，在标记之后，它使用 ob_get_contents() 来获取缓冲区的内容（通常是你页面的所有 HTML 源代码，它将已经发送到浏览器）并将其放入一个字符串中。
ob_end_clean () empties the buffer and frees some memory. We don't need the source code anymore because we just stored it in $pageContents.
ob_end_clean() 清空缓冲区并释放一些内存。我们不再需要源代码，因为我们只是将其存储在 $pageContents 中。
Then, lastly, I do a simple find & replace on your page's source code ($pageContents) for any instances of '' and replace them to whatever the $pageTitle variable was set to. Of course, it will then replace <title><!--TITLE--></title>with Your Page's Title. After that, I echo the $pageContents, just like the browser would have.
然后，最后，我在您页面的源代码 ($pageContents) 上对 '' 的任何实例进行简单的查找和替换，并将它们替换为 $pageTitle 变量设置的任何内容。当然，它随后会替换<title><!--TITLE--></title>为您页面的标题。之后，我回显 $pageContents，就像浏览器一样。
It effectively holds onto output so you can manipulate it before sending it to the browser.
它有效地保持输出，因此您可以在将其发送到浏览器之前对其进行操作。
Hopefully my comments are clear enough. Look up ob_start () in the php manual ( http://php.net/ob_start) if you want to know exactly how that works (and you should) :)
希望我的评论足够清楚。如果您想确切知道它是如何工作的（并且您应该），请在 php 手册（http://php.net/ob_start）中查找 ob_start ( ) :)
回答by Federico klez Culloca
You parse the field from the database as usual.
您像往常一样解析数据库中的字段。
Then let's say you put it in a variable called $title, you just
然后假设你把它放在一个名为 的变量中$title，你只是
<html>
<head>
<title>Ultan.me - <?php echo htmlspecialchars($title);?></title>
</head>
EDIT:
编辑：
I see your problem. You have to set $titleBEFORE using it. That is, you should query the database before <title>...
我看到你的问题。您必须$title在使用之前进行设置。也就是说，你应该先查询数据库<title>...
回答by Hasan A Yousef
What about using something like:
使用类似的东西怎么样：
<?php
$page_title = "Your page tile";
include("navigation.php"); // if required
echo("<title>$page_title</title>");
?>
回答by Sterica Capatina
create a new page php and add this code:
创建一个新页面 php 并添加以下代码：
<?php
function ch_title($title){
$output = ob_get_contents();
if ( ob_get_length() > 0) { ob_end_clean(); }
$patterns = array("/<title>(.*?)<\/title>/");
$replacements = array("<title>$title</title>");
$output = preg_replace($patterns, $replacements,$output);
echo $output;
}
?>in <head>add code: <?php require 'page.php' ?>and on each page you call the function ch_title('my title');
在<head>添加代码：<?php require 'page.php' ?>每个网页上调用该函数ch_title('my title');
回答by zerkms
Move the data retrieval at the top of the script, and after that use:
将数据检索移至脚本顶部，然后使用：
<title>Ultan.me - <?php echo htmlspecialchars($title, ENT_QUOTES, 'UTF-8'); ?></title>
回答by Andres Lowrie
You need to set the value of $titlebefore echoing it.
您需要$title在回显之前设置的值。
Also, you should really sanitize any data before using it in queries as this is a security risk
此外，您应该在查询中使用任何数据之前对其进行清理，因为这是一个安全风险
回答by Nana Partykar
header.phphas the title tag set to <title>%TITLE%</title>;the "%" are important since hardly anyone types %TITLE% so u can use that for str_replace() later. then, you use output buffer like so
header.php将标题标记设置为<title>%TITLE%</title>;“%”很重要，因为几乎没有人输入 %TITLE%，因此您可以稍后将其用于 str_replace()。然后，您像这样使用输出缓冲区
<?php
ob_start();
include("header.php");
$buffer=ob_get_contents();
ob_end_clean();
$buffer=str_replace("%TITLE%","NEW TITLE",$buffer);
echo $buffer;
?>
For more reference, click PHP - how to change title of the page AFTER including header.php?
如需更多参考，请单击PHP - 如何在包含 header.php 后更改页面标题？
回答by Martin
I know this is an old post but having read this I think this solution is much simpler (though technically it solves the problem with Javascript not PHP).
我知道这是一篇旧帖子，但读过这篇文章后，我认为这个解决方案要简单得多（尽管从技术上讲，它解决了 Javascript 而不是 PHP 的问题）。
<html>
<head>
<title>Ultan.me - Unset</title>
<script type="text/javascript">
function setTitle( text ) {
document.title = text;
}
</script>
<!-- other head info -->
</head>
<?php
// Make the call to the DB to get the title text. See OP post for example
$title_text = "Ultan.me - DB Title";
// Use body onload to set the title of the page
print "<body onload=\"setTitle( '$title_text' )\" >";
// Rest of your code here
print "<p>Either use php to print stuff</p>";
?>
<p>or just drop in and out of php</p>
<?php
// close the html page
print "</body></html>";
?>
回答by nilved
The problem is that $titleis being referenced on line 5 before it's being assigned on line 58. Rearranging your code isn't easy, because the data is both retrieved and output at the same time. Just to test, how does something like this work?
问题是$title它在第 58 行被赋值之前在第 5 行被引用。重新排列你的代码并不容易，因为数据是同时被检索和输出的。只是为了测试，这样的事情是如何工作的？
Because you're only retrieving one row, you don't need to use a while loop, but I left it with hopes that it'll make it easier for you to relate to your current code. All I've done is removed the actual output from your data retrieval, and added variables for category and category name which are then referred to as usual later on. Also, I haven't tested this. :)
因为您只检索一行，所以不需要使用 while 循环，但我希望它能让您更轻松地与当前代码相关联。我所做的只是从您的数据检索中删除了实际输出，并为类别和类别名称添加了变量，然后在以后照常引用这些变量。另外，我没有测试过这个。:)
回答by nilved
It'll be tricky to rearrange your code to make this work, but I'll try :)
重新排列代码以使其正常工作会很棘手，但我会尝试:)
So, put this at the top of your code:
所以，把它放在你的代码的顶部：
<?php require_once('mysql.php'); ?>
The top of the file should look like:
该文件的顶部应如下所示：
<?php require_once('mysql.php'); ?>
<html>
<head>
<meta name="keywords" content="Mac user Ultan Casey TheCompuGeeks UltanKC">
<title>Ultan.me - <?php echo htmlspecialchars($title); ?> </title>
Then, create a file called mysql.php in the same directory that the file which contains the code you quoted is in.
然后，在包含您引用的代码的文件所在的目录中创建一个名为 mysql.php 的文件。
Put this is mysql.php:
把这是mysql.php：
<?php
mysql_connect ('localhost', 'root', 'root');
mysql_select_db ('ultankc');
if (!isset($_GET['id']) || !is_numeric($_GET['id'])) {
die("Invalid ID specified.");
}
$id = (int)$_GET['id'];
$sql = "SELECT * FROM php_blog WHERE id='$id' LIMIT 1";
$result = mysql_query($sql) or print ("Can't select entry from table php_blog.<br />" . $sql . "<br />" . mysql_error());
$res = mysql_fetch_assoc($result);
$date = date("l F d Y", $res['timestamp']);
$title = $res['title'];
$entry = $res['entry'];
$get_categories = mysql_query("SELECT * FROM php_blog_categories WHERE `category_id` = $res['category']");
$category = mysql_fetch_array($get_categories);
?>
Well, hope that helped :)
好吧，希望有帮助:)
