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demo.php
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demo.php
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<?php
function resize($newWidth, $newHeight, $targetFile, $originalFile) {
$info = getimagesize($originalFile);
$mime = $info['mime'];
switch ($mime) {
case 'image/jpeg':
$image_create_func = 'imagecreatefromjpeg';
$image_save_func = 'imagejpeg';
$new_image_ext = 'jpg';
break;
case 'image/png':
$image_create_func = 'imagecreatefrompng';
$image_save_func = 'imagepng';
$new_image_ext = 'png';
break;
case 'image/gif':
$image_create_func = 'imagecreatefromgif';
$image_save_func = 'imagegif';
$new_image_ext = 'gif';
break;
default:
throw new Exception('Unknown image type.');
}
$img = $image_create_func($originalFile);
list($width, $height) = getimagesize($originalFile);
$tmp = imagecreatetruecolor($newWidth, $newHeight);
imagecopyresampled($tmp, $img, 0, 0, 0, 0, $newWidth, $newHeight, $width, $height);
if (file_exists($targetFile))
{
unlink($targetFile);
}
$image_save_func($tmp, "$targetFile");
}
//echo resize(500, 350, 'postImages/dimension.jpg', 'postImages/postimage5bd451ae24b7c.jpg');
?>