Please help urgently WROX BOOKS PHP PROGRAMS!!

rohit54

Hello,

I am new to php. Currently following wrox books Beginning PHP5, Apache and MYSQL web development.

By taking help from book i developed my image hosting service

http://talktorohit54198.byethost33.com/index.html

the code is taken from wrox book from chap of handling images.

everything is working but the problem is when modifying the image that is either making it black and white or embd caption etc the image get modified and also the modified image get stored in my image folder but when pulling the modified image back that is when after modfying i am showing the image after the user press save the image get displayed is the simple one not the modified one, this problem occur on my free hosting service the same code works fine at my local host

the point to note is that after some time (i dnt knw whether it happens with passage of time or restarting browser) when i access that image directly the modified image get shown.

The problem is the modification happens instantly but does not shows up instantly in my browser why is it so ? please help me its my first big program of php i dnt want it to fail

with regard,
Rohit sinha

bpat1434

This sounds like a cache issue. Try modifying the file again, and then when you get to the page, hard-refresh your browser (ctl + F5 in Firefox & IE on Windows) and see if the image changes. If so, you might have to look into some .htaccess stuff to send proper cache control headers. See: Apache Speed Cache Control

In this instance, setting the "Expires" to a date in the past and "Last Modified" to the current date and time should get you the effect you're looking for.

rohit54

k so its a cache problem

i used this in my page

Header("Cache-control: private, no-cache");
Header("Expires: Mon, 26 Jun 1997 05:00:00 GMT");
Header("Pragma: no-cache");

and now the preview button gives me modified image.

but the save button does not coz save does goes to a new window but it returns value mode=change to itself please tell me how to make this also work

i had tried clear cache function also but not worked

pressing hard refresh work after saving is there any function to hard refresh in php i searched but didnt find.

header("content-type:image/jpeg");
imagejpeg($image);

this thing display the image

even if u tell me what should i write in content type so that image and text both i can display...

please help me 🙁

With regards:
Rohit Sinha

bpat1434

One work around would be to add a unique parameter to the query string in the URL (like a timestamp) which will "never" be the same. Then the browser "thinks" it's a new request when it's not.

rohit54

Please how a example some more details how to do it ?
i am new to this :queasy:

bpat1434

/path/to/image?t=10373689905701357

echo '/path/to/image?t='.time();