[SOLVED] Thumbnails on the fly

[bluebyyou]

I was helped earlier to get this going to create a thumbnail and save it. Now I wanted to go a step further and use it to create the thumbnail on the fly instead of saving it. however instead of outputting an image i get a bunck of jibberish text.

 

I tried calling just the function with the image location as well as calling the function inside the img tag.

 

Is this even possible?

 

Here is the code:

<?php
function thumbnail($image_location){
//Create Thumbnail Image
$image = imagecreatefromjpeg("uploads/$image_location");							// Uploaded file location
$image_width=imagesx($image);													// Get Photo width
$image_height=imagesy($image);													// Get Photo height

// Thumbnail Dimensions
$thumb_width = 228;																// Thumbnail Display Width
$thumb_height = 170;																// Thumbnail Display Height

// Thumbnail Image Quality
$img_quality = 75;																// Image quality for the web is 75 dpi

$height_ratio = round($thumb_height / $image_height, 2);						// Calculate height shrink ratio
$width_ratio = round($thumb_width / $image_width, 2) ;							// Calculate width shrink ratio


if ($image_height <= $thumb_height && $image_width <= $thumb_width) 		
{
$thumbnail_width = $image_width;												//Keep original width		
$thumbnail_height = $image_height;												//Keep original height
}
else if ($image_height > $thumb_height || $image_width > $thumb_width)
{

if ( $image_height > $thumb_height && $image_width < $thumb_width )		
{

$thumbnail_width = $image_width * $height_ratio;							// shrink width 
$thumbnail_height = $image_height * $height_ratio;							// shrink height
}
else if ($image_width > $thumb_width && $image_height < $thumb_height )
{
//echo "here";
$thumbnail_width = $image_width * $width_ratio;								// shrink width 
$thumbnail_height = $image_height * $width_ratio;							// shrink height
}
else //($origh > $thumb_height && $origw > $thumb_width)
{
$thumbnail_width = $image_width * $width_ratio;								// shrink width 
$thumbnail_height = $image_height * $width_ratio;							// shrink height	
}	
}

$thumbnail = imagecreatetruecolor($thumbnail_width,$thumbnail_height);
imagecopyresized($thumbnail,$image,0,0,0,0,$thumbnail_width,$thumbnail_height,$image_width,$image_height);
imagejpeg($thumbnail,NULL,$img_quality);
imagedestroy($thumbnail);
}
?>

[cooldude832]

well that ain't "jibirish" its the binaries of the actual image this is because you need to define that data to something like a script and provide some headers or store it or somethign, but just outputing

echo "<img src=\"".image_thumb($image)."\" />";

will do exactly what you said

[bluebyyou]

well I was trying to do this on a page where the headers were already output so what would I store the info in to get it to work in my page?

[bluebyyou]

I found the solution in the user notes on the phpmanual page for the imagejpeg() function.

 

//Call this in the page you want the thumbnail
<img src="thumb.php?src=<?php echo $picturefile; ?>" />

 

//Thumb.php
<?php

header("Content-type: image/jpeg");

//Create Thumbnail Image
$image = imagecreatefromjpeg("uploads/$_GET[src]");							// Uploaded file location
$image_width=imagesx($image);													// Get Photo width
$image_height=imagesy($image);													// Get Photo height

// Thumbnail Dimensions
$thumb_width = 385;																// Thumbnail Display Width
$thumb_height = 289;																// Thumbnail Display Height

// Thumbnail Image Quality
$img_quality = 75;																// Image quality for the web is 75 dpi

$height_ratio = round($thumb_height / $image_height, 2);						// Calculate height shrink ratio
$width_ratio = round($thumb_width / $image_width, 2) ;							// Calculate width shrink ratio


if ($image_height <= $thumb_height && $image_width <= $thumb_width) 		
{
$thumbnail_width = $image_width;												//Keep original width		
$thumbnail_height = $image_height;												//Keep original height
}
else if ($image_height > $thumb_height || $image_width > $thumb_width)
{

if ( $image_height > $thumb_height && $image_width < $thumb_width )		
{

$thumbnail_width = $image_width * $height_ratio;							// shrink width 
$thumbnail_height = $image_height * $height_ratio;							// shrink height
}
else if ($image_width > $thumb_width && $image_height < $thumb_height )
{
//echo "here";
$thumbnail_width = $image_width * $width_ratio;								// shrink width 
$thumbnail_height = $image_height * $width_ratio;							// shrink height
}
else //($origh > $thumb_height && $origw > $thumb_width)
{
$thumbnail_width = $image_width * $width_ratio;								// shrink width 
$thumbnail_height = $image_height * $width_ratio;							// shrink height	
}	
}

$thumbnail = imagecreatetruecolor($thumbnail_width,$thumbnail_height);
imagecopyresized($thumbnail,$image,0,0,0,0,$thumbnail_width,$thumbnail_height,$image_width,$image_height);
imagejpeg($thumbnail,NULL,$img_quality);
imagedestroy($thumbnail);

?>