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This code is used to generate thumbnails on fly in proportion to the original image size to keep the quality of the image.
Supported image formats : jpeg and png.
image.php
| <?php
$image_base = explode('.', imagepath);
$image_ext = $image_base[1];
$img_path= $imagepath;
if(strtolower($image_ext) == 'jpg') {
$oImage = imagecreatefromjpeg($img_path);
}elseif(strtolower($image_ext) == 'png') {
$oImage = imagecreatefrompng($img_path);
}
$old_x=imagesx($oImage);
$old_y=imagesy($oImage);
if($old_x>=$old_y){
$original_aspect_ratio=$old_x/$old_y;
$width_max=true;
}elseif($old_x<$old_y){
$original_aspect_ratio=$old_y/$old_x;
$height_max=true;
}
if($old_x<=$width && $old_y<=$height){
$thumb_w=$old_x;
$thumb_h=$old_y;
}else{
if($old_x>=$old_y){
$height=$height/$original_aspect_ratio;
$thumb_w=$width;
$thumb_h=$height;
}elseif($old_x<$old_y){
$width=$width/$original_aspect_ratio;
$thumb_w=$width;
$thumb_h=$height;
}
}
$dst_img=ImageCreateTrueColor($thumb_w,$thumb_h);
imagecopyresampled($dst_img,$oImage,0,0,0,0,$thumb_w,$thumb_h,$old_x,$old_y);
if(strtolower($image_ext) == 'jpg') {
imagejpeg($dst_img);
}elseif(strtolower($image_ext) == 'png') {
imagepng($dst_img);
}
?> | |
Usage Exmaple
| //The width and height are the size of the window where the image is to be displayed.
<img src="image.php?imagepath=path&width=200&width=300"> | |
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