Imagick
I have been learning to use Imagick recently for resizing images already stored on the server for various size requirements on different pages.
But how do I get around the requirement of providing the header info to echo out an image after I resize it?
<?php
$im = new Imagick("image.jpg");
$im->thumbnailImage( 200, 200, true );
$shadow = $im->clone();
$shadow->setImageBackgroundColor( new ImagickPixel( 'black' ) );
$shadow->shadowImage( 80, 1, 5, 5 );
$shadow->compositeImage( $im, Imagick::COMPOSITE_OVER, 0, 0 );
//this bit
header( "Content-Type: image/jpg" );
echo $shadow;
?>I get headers already sent error as this code is used after I have a few include files.
A login check is included, then the header page with the head tag and navigation links and page logo etc.
There must surely be a way to resize an image and output it without having to output the raw image data.
Surely most peoples usage of Imagick to resize images will be somewhere within their scripts where output/header info has already been sent!
Cheers
pr0gr4mm3r posted this at 20:52 — 11th June 2008.
He has: 1,502 posts
Joined: Sep 2006
You are probably getting errors because you tried to send a header after sending output.
You do have to output the raw image data, and you need to have a separate script for that. Put that code in your original post in its own PHP file, and call it like it was an image from your main page:
<img src="http://www.example.com/path/to/script.php" />greg posted this at 23:04 — 11th June 2008.
He has: 1,581 posts
Joined: Nov 2005
Excellent thanks, worked perfectly.
I used some url info on it as images to be displayed depends on member and member settings.
I understand the header error, I knew it was coming before I tried the script, but why does sending more header info in an include file avoid the error?
The include file called by the IMG tag is still after headers are already sent.
Cheers
pr0gr4mm3r posted this at 03:17 — 12th June 2008.
He has: 1,502 posts
Joined: Sep 2006
When you are calling it in an image tag, your browser treats it as a completely separate HTTP request. So instead of thinking it as an include file, think of it as a separate request/instance altogether.
greg posted this at 16:35 — 12th June 2008.
He has: 1,581 posts
Joined: Nov 2005
So it sort of applies the header to the img only.
Cheers pr0gr4mm3r
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