I guess, this is a very simple question. I want my wordpress theme to automatically change some global variables on a given date.
My Theme changes color and some other things every two months. From now on, I want to type in the needed variables before that date and let Wordpress do the changes. I could do that from within the loop, so that the first person who enters the site on that date initiates the change. But that would mean extra code, everytime the loop is called. Is it possible to perform that task automatically?
I haven't used WP in ages, but I think this will work, change time_to_change_theme to the forward date you want. I have no idea where to put this, I am sure you will work it out though.
<?php
$time_to_change_theme = strtotime("2012-12-31 12:12:12"); // the time in the future you want to change the theme
$time_now = strtotime(now);
if($time_to_change_theme > $time_now)
{
echo "Use current theme";
}else{
echo "Change theme";
update_option('current_theme', '[theme name]'); // this should update the current theme
}
?>
Uses code from this post by harmen
Related
I'm using Kirby CMS and creating a little snippet which limits by posts by what number they are, and what date they are. A way to create a 'autopost' system basically.
$today = new DateTime("now"); //Declare today
$startdate = new DateTime("2013-09-12"); //Declare startdate
$interval = $startdate->diff($today); //Find the difference between startdate & today
$latest = $interval->format('%a'); //Declare $latest variable to be that interval, formatted as integer
So I have that little bit which creates my $latest variable which I can then use to control the posts that are displayed.
My problem is, I don't want to have to change my $startdate on every different kind of page template I have, so I want to make it site-wide somehow.
I tried putting it as a snippet with Kirby's snippet() function but that doesn't work. The snippets must be being brought into the page after the snippet has already been run I guess.
How can I make my snippet apply to my whole site?
PHP doesn't have site-wide variables. The best you can do is put the assignments in a script, e.g. site.php, and have all your pages begin with require 'site.php'; to initialize these variables.
I am developing a simple system of sample products with Object Oriented PHP, very simple thing. So far, no problem, but I have to create a button that adds a product code recorded in the database to a form in the sidebar. I do not know to develop a shopping cart with OO PHP, and codes that I find always give error because of the call of the database, or when the data list. I've been thinking of doing for JS, any help?
sorry my bad english
I got it, first I did when I click a link step by GET and the ID Code I need after seto it in a cookie, each cookie with an ID. Then I check if cookie has registered with the IDs. Not the best and most correct, but it works (more or less). Now another problem, I need to click two times to get the result as it passes by id and need to be caught refresh = /
I think it was a bit confusing but it is the maximum that dyslexia allows me to do hehehe
Here I set up the structure with the data I have in my product page:
add
<?php
$cod_get = $_GET['cod'];
setcookie("SITENAME_cod_".$id_get."", $cod_get, time()+3600, "/","", 0);
?>
And here I have a loop checking if cookie with ids, I think it will give problems, but for now I think it works ...
Thank you all.
$produto = new produtos();
$i = 0;
$produto->selecionaTudo($produto);
$produto->selecionaCampos($produto);
while($res = $produto->retornaDados()):
$res->id;
$i++;
$get_cookie = $_COOKIE['SITENAME_cod_'.$res->id.''];
if (isset($get_cookie)) {
echo $get_cookie.', ';
}else{
echo "";
}
endwhile;
One solution to automatically building navigation for a site is by scanning a folder for documents like this:
foreach(glob('pages/*.pg.php') as $_SITE_NAV_filePath):
$_SITE_NAV_filePath = explode('.pg',pathinfo($_SITE_NAV_filePath,PATHINFO_FILENAME));
$_SITE_NAV_fileName = $_SITE_NAV_filePath[0];
$_SITE_NAV_qv = preg_replace('/([A-Z])/','-$1',$_SITE_NAV_fileName); $_SITE_NAV_qv = trim($_SITE_NAV_qv,'-');
$_SITE_NAV_name = preg_replace('/([A-Z])/',' $1',$_SITE_NAV_fileName);
?>
<li><?=$_SITE_NAV_name?></li>
<?php
endforeach;
This code will turn "AnAwesomePage.pg.php" into a menu item like this :
<li>An Awesome Page</li>
This might be bad practice (?).
Anyway; I don't use this method very often since most of the time the sites have a database, and with that comes better solutions...
But my question is this:
Is there a way to prefix the filename with a integer followed by and underscore (3_AnAwesomePage.pg.php), for sorting order purposes, and pass it somehow to the destination page outside of the querystring and without any async javascript?
I could just explode the filename once again on "_" to get the sort order and store it somewhere, somehow?
This is the code for handeling the page query request:
$_SITE_PAGE['qv'] = $_GET['page'];
if (empty($_SITE_PAGE['qv'])){ $_SITE_PAGE['qv'] = explode('-','Home'); }
else { $_SITE_PAGE['qv'] = explode('-',$_GET['page']); }
$_SITE_PAGE['file'] = 'pages/'.implode($_SITE_PAGE['qv']).'.pg.php';
This code turns "An-Awesome-Page" back into "AnAwesomePage.pg.php" so it's possible to include it with php.
But with a prefix, it's not so easy.
The probliem is; Now there's no way to know what prefix number there was before since it has been stripped away from the query string. So I need to send it somehow along in the "background".
One very bad solution I came up with was to transform the navigation link into a form button and just _POST the prefix interger along with the form. At fist it sounded like a nice solution, but then I realized that once a user refreshes their page, it didn't look very good. And after all, that's not what forms are for either...
Any good solutions out there?
Or some other and better way for dealing with this?
There are two ways to keep that number saved, you can use cookies or php session variables.
But in this case, if user first enter the url in the browser or in a new browser, then he should be taken to default number.
Like you have:
1_first-page.php
2_first-page.php
3_first-page.php
If user enter the url like: domain.com/?page=first-page, you have to take him to 1_first-page.php to any number which you want to be default.
I'm using Wordpress and developed some site-specific plugins for it, additionally my theme is customized to fit the requirements of the plugins in the backend.
The last days I fiddled with transients in Wordpress. In some tutorials they're saying "If your're using custom queries and their results are cachable: Use a transient". Sounds good but I'm wondering when to use transients to get a real advantage.
I mean, even when using transients there have to be at least two queries in the background, haven't it? The first one for checking the validity, second one for the transient itself.
So is it really useful to use a transient i.e. for a custom WP_Query?
Thanks a lot for your help and thoughts.
Seems fairly straightforward. It's a literal class helper that allows you to store objects in a 'memcache' type fashion. You first set the transient
function do_something_here($callback_param = 'value'){
$key = 'do_something_' . $callback_param;//set the name of our transient equal to the value of the callback param being passed in the function.
$my_query = get_transient($myKey); //if we've stored this request before, then use it.
if($my_query !=== false){
//we found a previous existing version of this query. let's use it.
return $my_query;
}else{
//it doesn't exist, we need to build the transient.
//do our database querying here, global $wpdb; etc
//We are going to pretend our returned variable is 'george'
$value = george;
$length = 60*60*24; //how long do we want the transient to exist? 1 day here.
set_transient($key, $value, $length);
return $value;
}
}
Now that we have created our trigger and bound it to the name of '$key', we can access it anytime by using the exact value that key implies (which we declared earlier).
echo 'I wanted to do something, so : ' . do_something('value') . ' is what i did! ';
By utilizing this format you can hold queries in a 'cache' like world and use them to generate your responses. This is similar in a way to using 'trigger' events in MySql. Infact, this is a PORTION of a TECHNIQUE commonly referred to as long polling.
im trying to figure out how i can show the last 3-5 or so pages within my site a person has visited. I did some searching, and I couldn't find a WP plugin that does so, if anyone knows of one, please point me in that direction :) if not, I'll have to write it from scratch, and thats where i'll need the help.
I've been trying to understand the DB and how it works. I'm assuming that this is where the magic will happen, with PHP, unless there is a javascript option using cookies to do it.
Im open to all ideas :P & Thank you
If i were to code such a plugin, i'd use the session cookies to populate an array via array_unshift() and array_pop(). it'd be as simple as :
$server_url = "http://mydomain.com";
$current_url = $server_url.$_SERVER['PHP_SELF'];
$history_max_url = 5; // change to the number of urls in the history array
//Assign _SESSION array to variable, create one if empty ::: Thanks to Sold Out Activist for the explanation!
$history = (array) $_SESSION['history'];
//Add current url as the latest visit
array_unshift($history, $current_url);
//If history array is full, remove oldest entry
if (count($history) > $history_max_url) {
array_pop($history);
}
//update session variable
$_SESSION['history']=$history;
Now i've coded this on the fly. There might be syntax errors or typos. If such a mistake appears, just put a notice and i'll modify it. The purpose of this answer is mostly to make a proof of concept. You can adapt this to your liking. Please note that i assume that session_start() is already in your code.
Hope it helps.
===============
Hey! Sorry about the late answer, i was out of town for a couple of days! :)
This addon is to answer your request for a print out solution with LI tags
Here's what i'd do :
print "<ol>";
foreach($_SESSION['history'] as $line) {
print "<li>".$line.</li>";
}
print "</ol>";
Simple as that. you should read the foreach loop here : http://www.php.net/manual/en/control-structures.foreach.php
As for the session_start();, put it before you use any $_SESSION variables.
Hope it helped! :)
I'm going to update and translate the code above for WordPress 5+ because the original question has the wordpress tag. Note that you don't need session_start() anywhere.
Here it goes, add the code below to your singular.php template (or single.php + page.php templates, depending on what you need):
/**
* Store last visited ID (WordPress ID)
*/
function so7035465_store_last_id() {
global $post;
$postId = $post->ID; // or get the post ID from your template
$historyMaxUrl = 3; // number of URLs in the history array
$history = (array) $_SESSION['history'];
array_unshift($history, $postId);
if (count($history) > $historyMaxUrl) {
array_pop($history);
}
$_SESSION['history'] = $history;
}
// Display latest viewed posts (or pages) wherever you want
echo '<ul>';
foreach ($_SESSION['history'] as $lastViewedId) {
echo '<li>' . get_permalink($lastViewedId) . '</li>';
}
echo '</ul>';
You can also store latest viewed custom post types (CPT) by placing the so7035465_store_last_id() function in your single-cpt.php template.
You can also add it to a hook or inject it in your template as an action, but that is beyond the scope of this question.