function savePostImage($post_id, $file_url)
{
global $blog_settings;
//echo "<br/>saving image ..." . $file_url. " ----";
if ($file_url != '') {
$post_icon_folder = 'data/images';
$folder = dirname(__FILE__) . '/../' . $post_icon_folder;
// check destination folder
if (!is_dir($folder)) {
print T_('The folder data/images does not exists !');
return '';
}
if (!is_writable($folder)) {
print T_('The folder data/images must writable !');
return '';
}
$tmp_folder = dirname(__FILE__) . '/../data/tmp';
// check destination folder
if (!is_dir($tmp_folder)) {
print T_('The folder data/tmp does not exists !');
return '';
}
if (!is_writable($tmp_folder)) {
print T_('The folder data/tmp must writable !');
return '';
}
$file_extension = null;
if (endWith(strtolower($file_url), '.png')) {
$file_extension = '.png';
} elseif (endWith(strtolower($file_url), '.gif')) {
$file_extension = '.gif';
} elseif (endWith(strtolower($file_url), '.jpg') || endWith(strtolower($file_url), '.jpeg')) {
$file_extension = '.jpg';
} else {
print T_('Unknown file extension');
return '';
}
#copy to post_id.png
$tmp_file = $tmp_folder . '/post' . $post_id . '-' . time() . '-tmp' . $file_extension;
if (!is_file($tmp_file)) {
unlink($tmp_file);
}
file_put_contents($tmp_file, file_get_contents($file_url));
if (!is_file($tmp_file)) {
print T_('File not found');
return '';
}
#resize image
$imgsize = getimagesize($tmp_file);
// check the image size
$allowed_ratio = 0.4;
if ($imgsize[0] / $imgsize[1] < $allowed_ratio || $imgsize[1] / $imgsize[0] < $allowed_ratio) {
unlink($tmp_file);
print T_('Bad image ratio');
return '';
}
$image = null;
switch ($file_extension) {
case '.jpg':
$image = imagecreatefromjpeg($tmp_file);
break;
case '.jpeg':
$image = imagecreatefromjpeg($tmp_file);
break;
case '.png':
$image = imagecreatefrompng($tmp_file);
break;
case '.gif':
$image = imagecreatefromgif($tmp_file);
break;
}
if ($image == null) {
unlink($tmp_file);
print T_('Unable to create image object');
return '';
}
$width = 250;
// defined width
$height = $imgsize[1] * ($width / $imgsize[0]);
// relative height
// if the image is smaller or equal : do not resize
if ($imgsize[1] <= $height) {
$height = $imgsize[1];
$width = $imgsize[0];
unlink($tmp_file);
unlink($image);
return '';
// and do not save
}
$final_image = imagecreatetruecolor($width, $height) or $error[] = T_('Error when creating final image');
$filename = 'post' . $post_id . '-' . time() . $file_extension;
$file_url = 'data/images/' . $filename;
$file_fullpath = $folder . '/' . strtolower($filename);
if (is_file($file_fullpath)) {
unlink($file_fullpath);
}
// Adding Alpha channel to created image :
imagealphablending($final_image, false);
imagesavealpha($final_image, true);
$trans_colour = imagecolorallocatealpha($final_image, 0, 0, 0, 127);
imagefilledrectangle($final_image, 0, 0, $width, $height, $trans_colour);
imagecopyresampled($final_image, $image, 0, 0, 0, 0, $width, $height, $imgsize[0], $imgsize[1]) or $error[] = T_('Error while resizing final image');
imagedestroy($image) or $error[] = T_('Error while deleting temporary image');
// save image to folder
if ($file_extension == '.jpg') {
$save = imagejpeg($final_image, $file_fullpath, 100);
}
if ($file_extension == '.png') {
$save = imagepng($final_image, $file_fullpath, 0);
}
if ($file_extension == '.gif') {
$save = imagegif($final_image, $file_fullpath);
}
unlink($tmp_file);
if ($save) {
#return image URL
return $file_url;
} else {
unlink($file_fullpath);
print T_('Problem during saving process');
return '';
}
}
}
/**
* @param $end
* @return \Closure
*/
function notEndWith($end)
{
return negate(endWith($end));
}
