PHP：如何在使用auto_prepend_file时设置动态标题？

The title says it all: I want the page to determine the title, but the title is being set before the page is being read (I think). Is there a way to accomplish this, or am I doomed to include the header on each individual page?

Here's what I have:

php.ini:

auto_prepend_file = "header.php"

header.php:

<?php 
    if (isset($title) == false) {
        $title = "foobar";
    }
    $title = "My Site : " . $title;
?>
<title><?php echo($title) ?></title>

index.php

<?php 
    $title = "Home"; // ideally this would make the title "My Site : Home"
?>

Instead of using auto_prepend_file, I would just use:

include 'header.php';

An important reason why I wouldn't use auto_prepend_file is, if you move to another server, you'll have to remember to edit the php.ini. If you just include the file, you can move your code to any server.

Also, just like Fred-ii- said, I wouldn't use parenthesis. Also, you are missing a semi-colon after the echo.

To take that a step further, I would create a file called something like $config.php or $vars.php. Include that before everything and have it define all your global variables and constants.

I would check this out: http://php.about.com/od/tutorials/ht/template_site.htm

This is not an ideal answer, but I could use CGI variables to get the name of the page, then turn that into a title.

function get_title($page){
    $title = str_replace("/", "", $page);
    $title = str_replace("_", " ", $title);
    $title = str_replace(".php", "", $title);
    $title = ucfirst($title);
    if($title = "Index"){
        $title = "Home";
    } elseif ($title == "") {
        $title = 'Foobar';
    }
    return $title;
}

$title = get_title($_SERVER["PHP_SELF"]);
$title = 'My Site: ' . $title;

As a follow-up to my original comment, I'm posting this as an answer because while it doesn't specifically solve the problem, it addresses the underlying cause.

Disclaimer: The code below has many problems, especially security, it's not meant to be copied directly but only explains the concept.

What you need to do is have a container file that includes your headers and whatever else, and each PHP file is included from there. For example, name your container index.php, and have the following in it:

<?php
    include 'header.php';

    if ($_GET['page'])
        include $_GET['page'].'.php';

    include 'footer.php';
?>

Then each PHP page you have will be wrapped in the index.php file, and you can add whatever you want in the header file which will be included in all of your files. That way you don't have to include anything in the individual page files.

The client will access your pages with a query string, such as: index.php?page=test

Again, for security reasons you will still want to include basic checks in each individual file, but technically this can be avoided in you plan for this. You definitely won't need to include huge headers in each file, like MySQL connections etc. Also for security you should have stringent checks on your $_GET variables to make sure that only the pages you want can be included.

I'd define a writeTitle (or similar) function in the header.php file which you're auto_prepending:

header.php

<?php

function writeTitle($title = 'foobar') {
    $title = "My Site : " . $title;
    return '<title>' . $title . </title>';
}

And then you can just call the function from your page scripts instead of setting a variable:

index.php

<?php

echo writeTitle('Home');