php javascript alert redirect

hi all

i want to show an alert box and then redirect page to another location through php code but its not working as needed.
As i cannot use PHP HEADER LOCATION because i m using echo before header. so i have to use javascript but through

PHP.

But If i use any one of them then they BOTH work fine like
or

but how can i get them both to work together through php.

vineet

re: php javascript alert redirect

You can put header() anywhere in the source file, as long as you enable output buffering using the ob_start() function. For example:
The above code is completely valid and will run properly, although it will result at very least in increased memory overhead.

Now, your JS code appears to be little poor on the syntax. At very least try to terminate each line with ";" as per language rules. The following code will work in all browsers and can be used with HTML 4.01 strict documents:
Oh, and one more thing. <script> has no "language" property. Use <script type="text/javascript"> instead.

re: php javascript alert redirect

hi unauthorised

i have amended code acording to you and the PHP Header redirect is working fine with ob_start() but the alert is not working.

vineet

re: php javascript alert redirect

obviously, the browser is redirected to the new page before any javascript is executed (because PHP is done on the server and Javascript on the Browser)

re: php javascript alert redirect

hi Dormilich

i have heard that javascript works on client side and works faster than server side scripts.
so if this is true then alert should popup first before the PHP Header redirect.

Or the popup is not working because we are generating alert popup through PHP.

vineet

re: php javascript alert redirect

You should never rely on JS to be enabled client side. There is no reason for it to be faster, but it often misbehaves client side (broken browsers or it's disabled) which isn't worth the few CPU cycles you save on the server.

Also, go read about ob_start() in the PHP documentation. Make sure you know what it does before copy-pasting it in your code.

If you want to execute JS code, you can't use header redirects. Use a JS redirect or don't use alerts at all. Just like Dormilich said, browsers will not render the page if they receive a redirect header. Look up the right RFC if you want more info.

re: php javascript alert redirect

I doubt that in general (there may be cases...)

you're mixing up server code and browser code. first, all of the server code is executed (i.e the redirect via header()), afterwards, all browser code is executed (i.e. show the popup via alert()).

nope, how you create the popup doesn't matter here. you could use Perl, Java or ASP and get the same result.

re: php javascript alert redirect

RFC 2616 that is.

......

re: php javascript alert redirect

Never believe anything you've heard, unless you can verify it yourself :-)

It's important to realize the difference between server-side and client-side code if you intend to work with server-side code at all.