How are these PHP function applied to a specific page in WordPress?
I'm fairly new to PHP and trying to understand it practical ways.
I'm getting most of what's going on in the following code, with the help of htt开发者_运维技巧p://www.php.net and http://codex.wordpress.org/Function_Reference/.
In its current situation, only one page on the site triggers the popup form if no cookie is set. Is that functionality specified within this code?
Here's the functions:
if (isset($_POST['confirm']) && isset($_POST['location'])) {
setcookie("Location", $_POST['location'], time()+3600);
}
elseif (!isset($_COOKIE["Location"])) {
setcookie("Location", "", 1);
}
elseif (isset($_POST['deny'])) {
setcookie("Location", "", 1);
}
// Popup confirmation
function show_popup($content) {
global $post;
$location = get_post_meta($post->ID, 'location', TRUE);
if (strtolower($l) == strtolower($location) || strlen($location) == 0
|| (isset($_COOKIE["Location"]) && strtolower($_COOKIE["Location"])
== strtolower($location))) {
return $content;
} else {
?>
<div id="popup">
<p>Foo.</p>
<p>Yes/No?</p>
<form action="<?php echo $PHP_SELF ?>" method="post">
<input type="hidden" name="location" value="<?php echo $location; ?>" />
<input type="submit" name="confirm" value="Yes" />
<input type="submit" name="deny" value="No" />
</form>
</div>
<?php
}
}
add_filter('the_content', 'show_popup');
// Adds content to the <head> tag
function add_meta_content() {
if(isset($_POST['deny'])) {
?>
<meta http-equiv="refresh" content="0;url=<?php bloginfo ('wpurl') ?>">
<?php
}
if(isset($_POST['confirm'])) {
?>
<meta http-equiv="refresh" content="0;url=<?php echo $PHP_SELF; ?>">
<?php
}
}
add_action('wp_head', 'add_meta_content');
It's the if statement in the show_popup function.
It either returns $content (ie. does nothing) or outputs a form.
If the current post has a meta field called location that's not 0 characters long, and there's not a cookie matching that location, it will output the form.
Ah, it was the "location" custom field, https://wordpress.stackexchange.com/questions/10457/how-are-these-php-functions-applied-to-a-specific-page-in-wordpress. Thanks to https://wordpress.stackexchange.com/users/2487/bainternet for the answer.
加载中,请稍侯......
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