I know this is very basic and I've never had the need before, but I want a PHP redirect to break out of any iframe (if applicable).
Is this possible?
I know that PHP sends a header to the browser, so it should be, but I can't see this anywhere.
So if I use this code then it always changes the parent and not just any iframe window:
<?php
header('Location: http://domain.com/');
?>
Of course this works, but I need it done from PHP:
<a href="page.php" target="_parent">
I'm using Symfony2 so will need to get it working in that too.
No JavaScript. PHP only (if possible).
You can't do it in PHP - if the browser is trying to load the page in a frame, then sending a Location header will simply load the new page in the frame too.
If you're trying to stop others from putting your site in a frame, you'd have to use JavaScript to detect it and do the redirect, otherwise target="_top" is the right approach.
From your controller in Symfony 2, return some variable (for example reloadMyIframe) then, when you want to reload your iframe. Then in view (twig probably), put something like this
{% if reloadMyIframe == true %}
// Add somethin like this <script...>window.parent.location.href = "http://jourTaret.dmn"
{% endif %}
If your view in Symfony is in PHP, you can use same logic just type it with php if statement.
As the guys have already said, there is no way to accomplish what you are trying to just with PHP or from Symfony controller.
Related
I need to pass parameters and an anchor in a php program to make sure the cursor is positioned at the last place it was in the page when it returns.
program.php?ID=123&ID2=456#777
ID=123
ID2=456
html anchor is #777
Can someone tell me how to make this work? Since it isn't working the way I'm doing it now. Thanks
The browser will not send the anchor to web server.
So PHP can't get the anchor from url.
maybe you can use javascript to request program.php?ID=123&ID2=456&anchor=777, then you can get the anchor by $_GET['anchor'].
Sorry for my bad english (ćoć).
If you want force the cursor to the position.
this code will redirect to http://website.com/page.php#anchor and the broswer will auto cursor the position.
<?php
header("location: http://website.com/page.php#anchor");
exit;
warning: take care about header function, there is the manual header function
If the current page is the same as the redirect page, above the code will infinite redirect and the browser will throw error. So you have to write some logic, make it redirect when you want. Or just write two different page, one to show content, other one redirect to content page with anchor.
But I still think it is better to do that by JavaScript.
Currently I have subdomain.mydomain.com, which redirects to mydomain.com/subdomain(I am using a PHP - codeigniter framework).
But all I want is after redirection url should remain subdomain.mydomain.com instead of mydomain.com/subdomain.
Is there any way to achieve this?
if you like to keep it pure html + php, i suggest you look into the iframe tag from html.
it is basically a browser window within your current browser window. Set the iframe to cover up 100% of your current browser window and set it's url to mydomain.com/subdomain.
what you'll see is that it's displaying content from mydomain.com/subdomain but your url field in your main browser is still saying subdomain.mydomain.com
Write this code in the routes.php file(present in config folder):
$route['mydomain.com/subdomain'] = "subdomain.mydomain.com";
Basically it's logic is
$route['route_you_want_to_show'] = "current_route";
But mind well in codeigniter routes are formed from the redirection of code to controller and its methods.
Is there a php or javascript code that can detect the current user's page and then add <a class="active"> to an item in a ul (my menu). I include my menu in my pages with PHP include so making change is easy; I only have to edit it once. But, with that method, I can't individually set each page to have a class="active". How can I do this?
You several options, e.g.,
The part that handles navigations can read the request URI directly. This can be done by reading $_SERVER['REQUEST_URI'] (don't forget this may include the query string).
At some point, you must know what page you're on, because you decide which content you display based on that. You can define a function that handles the navigation markup and pass it the name of the current page so that it knows which one it is.
If I'm understanding your question correctly, what I usually do is set a variable before I include the header, like
$current = "home";
And then in the header I'd have an if statement in each link
<a href="/home" <?php if ( $current == "home" ) { echo "class='active'" } ?>>Home</a>
Could be ways to improve it, but it's simple if your menu isn't too big.
In PHP, you can look at the value of $_SERVER['REQUEST_URI'].
In JavaScript, you can examine window.location.
I have an iFrame that does some background processing. When this processing is complete I would like to re-direct the user to another page, but the header change code is only affecting the embedded iFrame. Is there a way to target the main window?
I have seen the deprecated Meta redirect have a target attribute, but I don't know how widely it is supported.
In Javascript:
top.location.href = "resultpage.htm";
Works only if the top frame is on the same domain as the emitting page.
For a solution that works across domains and without Javascript, the following would work:
Continue
Use JavaScript to track content of frame, if content change, redirect browser :)
We can use javascript like this:
target.window.location='locationpage.php';
parent.window.location='index.php';
For me this always works without fail, have tried many of the others but there always seems to be some sort of issue....and it does not matter if headers have been sent etc.....
<?php
echo "<script>window.location = 'http://www.google.com'</script>";
?>
Remember this goes at the very bottom
If jquery is added in globally used header.php across the site then How to stop to load jquery library only for those pages of site which doesn't need actually? If we can't use more than one header.
purpose of question is to not to penalize those page with slow loading which actually don't need.
Your site shouldn't need more than one global-header, if you opt to even use headers to begin with. If it does, just include jQuery on all pages. It's a small cached file, it won't hurt the browsing experience.
By using the google-hosted version, it may be the case that many of your uses already have it cached before they even reach your site.
I have been guilty of pounding my fist into the nail while asking everyone else to move the hammer that's in the way...
Why not tackle the problem from the other end and use jQuery to optimize the first load?
If you have big pages that are already taking a while to download, why not section off the less-performant areas and use $().load() to fill those in?
The page will load quicker (better user experience) and you don't have to be adding any additional processing to pages that don't need it.
Cheers,
-jc
assuming you are loading the jQuery file from a correctly-configured webserver (or from google's CDN), it will be cached and not re-downloaded on each page. Assuming a visitor will hit at least one page on your site that needs jQuery then you really won't gain anything by trying to remove it from loading on pages that don't use any javascript features from the library.
First, use the compressed jquery for production. It's much smaller. Second, IIRC, once jquery is downloaded with the first page, it will be cached and won't need to be retrieved from your server for each subsequent request.
Otherwise, if you really need to explicitly load jquery only on those pages that need it, you would have to have some way for the body of your page to tell header.php that it doesn't need to load jquery. If header.php is loaded before "body.php" then that's pretty hard to do without some fancy output buffering or such.
If you're using a templating system like Smarty you could have a conditional in the master page template to check a $loadjquery flag that you set in body.php before sending the whole page off to be rendered. But that's complicated too.
Your question is very general, some specific would be great, maybe even a link to the site. Personally if you are using a CMS I would try to make some sort of "flag" for that page, or if you are simply loading a page and then loading the header from that page, insert a variable before you load the header and use that as your flag for loading jQuery.
An example:
If a user wants to see www.mysite.com then the following file would be loaded: www.mysite.com/index.php with the following code:
<?php $needJQuery = true;
include('header.php');
echo 'content will go here';
include('footer.php'); ?>
header.php would include something such as this:
<?php if ($needJQuery) { ?>
<script src="/jquery/jquery-min-3.2.1.js" />
etc. for all the content that you need above/below.
<?php } ?>
For the pages that don't need jQuery loaded, you would either leave $needJQuery undefined or you would do as follows:
<?php $needJQuery = false; ?>
Hope this helps,
As stated earlier, modify the header file so it'll check for the presence of flag variable and only output the jquery headers if needed.
If you don't have the ability to modify the header file, you could load it with output buffering turned on and filter the output before it heads out to the client:
<?php
ob_start();
include('header.php');
$header = ob_get_flush();
$cleanheader = some_operation_that_removes_the_jquery_script_tags($header);
echo $cleanheader
?>