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Send a raw HTTP header
(PHP 4, PHP 5)
Example 1600. Download dialogIf you want the user to be prompted to save the data you are sending, such as a generated PDF file, you can use the » Content-Disposition header to supply a recommended filename and force the browser to display the save dialog. <?phpExample 1601. Caching directivesPHP scripts often generate dynamic content that must not be cached by the client browser or any proxy caches between the server and the client browser. Many proxies and clients can be forced to disable caching with: <?php
Note:
You may find that your pages aren't cached even if you don't output all of the headers above. There are a number of options that users may be able to set for their browser that change its default caching behavior. By sending the headers above, you should override any settings that may otherwise cause the output of your script to be cached.
Additionally, session_cache_limiter() and
the Related Examples ( Source code ) » header Examples ( Source code ) » Send email with CC and BCC Examples ( Source code ) » Authenticate user Examples ( Source code ) » Prompt Browser password dialog Examples ( Source code ) » Open browser password dialog and authenticate user based on database Examples ( Source code ) » Cookie based login form and get last login time Examples ( Source code ) » File based login Examples ( Source code ) » Use Php class to control the HTML page font Examples ( Source code ) » The Table and HTMLTable Classes Examples ( Source code ) » The Table Class Examples ( Source code ) » Mail cc and bcc Examples ( Source code ) » Mail to multiple recipients Examples ( Source code ) » String Concatenation Operators Examples ( Source code ) » Pad a string to a certain length with another string Examples ( Source code ) » Draw Filled Arc Examples ( Source code ) » Drawing a Circle Code Examples / Notes » headeranonymous
When streaming a PDF file I would get the error "'There was an error opening this document. This file cannot be found." This seemed to only happen in IE6 that I'm aware of. After changing the Content-Disposition to inline (rather then attachment) it worked properly. s_donk_donk
the things from moehbass at gmail dot com is very useful.. thx! but 1 thing i noticed, as written: if(isset($_POST['ok'])) { if(isset($_POST['yesNo'])) header('Location: http://www.google.com/'); else header('Location: http://www.yahoo.com/'); } You can see it live at: http://labella-pizza.com/header.php it works fine, only if u put the php on the top. when u open the link above, u can copy paste the code included in the textarea to try it.. BUT when u run it, it didnt work. as u can see, the php code is below the html code. u have 1 simple thing to do : cut the php code and paste it at the top.. before the html code.. and run it... then u'll find it works fine! ^^ bholbrook
The first element of the header (i.e. "Location") is case sensitive depending on the browser. In IE7, <?php header("location:http://www.url.com"); ?> does not work as expected whereas <?php header ("Location:http://www.ulr.com"); ?> does work as expected. For a full list of headers and their values go here: http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html ik
If you want your download script to work in Safari you'll have to print quotation marks around the filename: header('Content-Disposition: attachment; filename="'.$fileName.'"'); ,otherwise Safari will just save the file as 'scriptname.php'. php
If you want to serve files to be opend in a separate application (also PDF files displayed in the Reader and not in the IE Plugin) with the dialog open/save as/cancel : Don't use the Content-disposition: attachmet and Cache-control: no-cache header at same time. Normaly the browser stores the file in a temporary directory and starts the default application for the mime-type with the path of the file as parameter. Problem : IE6 doesn't store because of no-cache. So the application (in my case AcrobatReader) displays the file can't be found. Greets Mik aleks
I recently had a hair-threatening problem with Firefox and XHTML 1.0 transitional. It worked fine with other browsers, and also with HTML 4.1. To cut a long story short, PHP-generated JS and CSS files were still being reported by the headers as text/html, while in the HTML they were text/css and application/javascript; Firefox having been told the page was XHTML 1.0 became anal-retentive and refused to style the page. (I think the JS still worked but I fixed it anyway.) Solution: header('Content-type: text/css'); and header('Content-type: application/javascript'); dylan
A quick way to make redirects permanent or temporary is to make use of the $http_response_code parameter in header(). <?php // 301 Moved Permanently header("Location: /foo.php",TRUE,301); // 302 Found header("Location: /foo.php",TRUE,302); header("Location: /foo.php"); // 303 See Other header("Location: /foo.php",TRUE,303); // 307 Temporary Redirect header("Location: /foo.php",TRUE,307); ?> The HTTP status code changes the way browsers and robots handle redirects, so if you are using header(Location:) it's a good idea to set the status code at the same time. Browsers typically re-request a 307 page every time, cache a 302 page for the session, and cache a 301 page for longer, or even indefinitely. Search engines typically transfer "page rank" to the new location for 301 redirects, but not for 302, 303 or |
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