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Question

Problems with imagesetpixel and displaying the image with php5 and gd 2.0 (or higher, apparently)

Answer 1

+1 A:

When a browser shows an image, it is downloaded separately and placed on a page. Because of this you cannot send HTML and a picture down in one request. What you need to have is a html/php page which has an tag with the src set to another page which will only send the data for the image.

eg: (index.php)

<html>
<body>
<image src="pic.php" />
</body>
</html>

now in another file called (pic.php) you would generate the image and send send it back to the response with a header of "content type" and absolutely nothing else (except for other headers maybe)

eg taken from http://www.webdeveloper.com/forum/showpost.php?p=879552&postcount=2

<?php

$number = "";
for ($i = 1; $i <= $lenght; $i++)
{
     $number .= rand(0,9)."";
}

$width = 11*$lenght;
$height = 30;

$img = ImageCreate($width, $height);
$background = imagecolorallocate($img,255,255,255);
$color_black = imagecolorallocate($img,0,0,0);
$color_grey = imagecolorallocate($img,169,169,169);
imagerectangle($img,0, 0,$width-1,$height-1,$color_grey);
imagestring($img, 5, $lenght, 7, $number, $color_black);
//////// VERY IMPORTANT
header('Content-Type: image/png');
//////// VERY IMPORTANT
imagepng($img);
imagedestroy($img); 

?>

Mladen Mihajlovic 2009-04-07 18:26:41

You, sir, are a *genius* thank you! :) All I want to do now is turn it into a function, and be able to pass x and y values in from a form...sigh... ;)

David Thomas 2009-04-07 19:00:04

No problem. Also no need to make a function, the <form> tag will be on the index.php page with the action being pic.php and then read the forms inputs by using $_REQUEST['x'] or $_GET['x'] see http://www.w3schools.com/PHP/php_get.asp for more info.

Mladen Mihajlovic 2009-04-07 19:29:18

I <3 Stackoverflow! :)

David Thomas 2009-04-07 22:16:54

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Problems with imagesetpixel and displaying the image with php5 and gd 2.0 (or higher, apparently)

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