I'm having trouble to get the following code to upload large images. It works great with images less than 1000px by 1000px, but breaks on anything bigger. Any help/ideas greatly appreciated.
Note: I have tried increasing the '$memoryNeeded>=10000000' to '7700000000' but still no joy.
if (!$error && is_uploaded_file($_FILES['galleryFile']['tmp_name'])) {
$format = strtolower(substr(strrchr($_FILES['galleryFile']['name'],"."),1));
$str = strtolower(trim($_FILES['galleryFile']['name']));
$str = preg_replace('/[^a-z0-9-]/', '-', $str);
$str = preg_replace('/-+/', "-", $str);
$filename=$str.'.'.$format;
$uploadGallery=$origFileDir.$filename;
foreach ($allowedImgFormats as $key => $value) {
$value==$format ? $imgFormatOK='1' : NULL;
}
$imgFormatOK=='0' ? $error='You are attempting to upload an image with an invalid format!<br />Please only upload images with ".gif", ".jpg" or ".jpeg" extensions.' : NULL;
开发者_开发技巧 if (!$error && move_uploaded_file($_FILES['galleryFile']['tmp_name'], $uploadGallery)){
$galleryW='944'; $galleryH='733';
$galleryInfo = getimagesize($uploadGallery);
$memoryNeeded = Round(($galleryInfo[0] * $galleryInfo[1] * $galleryInfo['bits'] * $galleryInfo['channels'] / 8 + Pow(2, 16)) * 1.65);
if ($memoryNeeded>=10000000) {
unlink($uploadGallery); $error='The chosen image is too large to process.<br />Please upload a smaller image (lower dimensions and/or resolution).';
} else {
list($wOrig, $hOrig) = getimagesize($uploadGallery);
$ratio_orig = $wOrig/$hOrig;
if ($wOrig > $galleryW) { $galleryW = $galleryH*$ratio_orig; $galleryH = $galleryW/$ratio_orig; } else { $galleryW=$wOrig; $galleryH=$hOrig; }
if ($galleryH > $galleryH) { $galleryH = $galleryW*$ratio_orig; $galleryW = $galleryH/$ratio_orig; }
$galleryP = imagecreatetruecolor($galleryW, $galleryH);
switch($format) {
case 'gif' : $thisGallery = imagecreatefromgif($uploadGallery); break;
case 'jpg' : $thisGallery = imagecreatefromjpeg($uploadGallery); break;
}
imagecopyresampled($galleryP, $thisGallery, 0, 0, 0, 0, $galleryW, $galleryH, $wOrig, $hOrig);
switch($format) {
case 'gif' : $createGallery=imagegif($galleryP, $galleryFileDir.$filename, 88); break;
case 'jpg' : $createGallery=imagejpeg($galleryP, $galleryFileDir.$filename, 88); break;
}
imagedestroy($galleryP); imagedestroy($thisGallery); unlink($uploadGallery);
if (!$createGallery) {
$error='The chosen image failed to transfer correctly.<br />Please try again, or attempt to upload an alternative image.';
file_exists($galleryFileDir.'/'.$filename) ? unlink($galleryFileDir.'/'.$filename) : NULL;
} else {
$_POST['imagename']=$filename;
mysql_query("INSERT INTO isgallery(imagename, assoc_object) VALUES('".$_POST['imagename']."', '".$_POST['id']."')");
}
}
} else {
!$error ? $error='The chosen image failed to upload correctly.<br />Please try again, or attempt to upload an alternative image.' : NULL;
file_exists($uploadGallery) ? unlink($uploadGallery) : NULL;
}
}
A 1000x1000 image requires at LEAST 3,000,000 bytes of memory if you're dealing with true color. and 4,000,000 if you're doing alpha transparency. Your $memoryNeeded
variable is useless if it's set to something larger than PHP's memory_limit
. It'll happily try to create an image and fail due to exceeded the limit.
You can check what the limit is with ini_get('memory_limit')
, though you most likely won't be able to directly use this value for calculations without some massaging, as it'll likely return something like '32M' (32 megabyte limit), instead of 33554432
.
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