0
我開發一個網站，用戶可以上傳多個圖像到服務器/網站，在我的上傳腳本中，我已經把圖像大小限制爲10MB。這是因爲我認爲很多現代相機拍攝大型圖像。PHP圖像上傳和調整大小內存不足（96MB內存限制）
上傳腳本一次一個地獲取每個圖像，並將其調整爲3個不同的版本，900x600,600x450和更小的縮略圖圖像，並且還將水印圖像放在2個更大圖像的頂部。
我把我的php.ini memory_limit設置爲96MB，我推測這很容易。
經過一番測試，我上傳了一張6.38MB大小的JPG圖片，分辨率爲6143 x 3855 px。我收到錯誤消息「致命錯誤：允許的內存大小100663296字節用盡（試圖分配24572字節）」
您認爲這是合理的需要這麼多的內存上傳和處理這種大小的圖像？或者你認爲這更可能是我腳本中編碼的問題？
96 MB內存限制對我來說似乎很重要。其他人有哪些經驗處理大型圖片上傳？我應該將內存限制設置爲128MB或更高？或者我應該看看重寫我的上傳腳本？
我的代碼如下加入：
//If a new image has been added, resize and upload to filesystem
if ($_FILES['new_image']['name'] !=''){
$allowed_types=array(
'image/gif' => '.gif',
'image/jpeg' => '.jpg',
'image/png' => '.png',
'image/x-png' => '.png',
'image/pjpeg' => '.jpg'
);
$img = $_FILES['new_image'];
// Check the file to be uploaded is the correct file type and is under 9MB
if ((array_key_exists($img['type'], $allowed_types)) && ($img['size'] < 9000000)) {
// File to be uploaded is Valid
// File to be uploaded is Valid
$imagename = stripslashes($_FILES['new_image']['name']);
// make the random file name
$randName = md5(rand() * time());
$ext = pathinfo($imagename, PATHINFO_EXTENSION);
$imagename = $randName . "." . $ext;
$source = $_FILES['new_image']['tmp_name'];
// Check if Directory Exists, if not create it
if(!file_exists("images/breeds/".$trimmed['profile_id']))
{
mkdir("images/breeds/".$trimmed['profile_id']) or die("Could not create images folder for article ".$trimmed['profile_id']);
}
// Check if thumbnail Directory Exists
if(!file_exists("images/breeds/".$trimmed['profile_id']."/thumbs"))
{
mkdir("images/breeds/".$trimmed['profile_id']."/thumbs") or die("Could not create thumbnail folder for article ".$trimmed['profile_id']);
}
// Check if thumbnail Directory Exists
if(!file_exists("images/breeds/".$trimmed['profile_id']."/large"))
{
mkdir("images/breeds/".$trimmed['profile_id']."/large") or die("Could not create thumbnail folder for article ".$trimmed['profile_id']);
}
$LargeImage = "images/breeds/".$trimmed['profile_id']."/large/".$imagename;
$NormalImage = "images/breeds/".$trimmed['profile_id']."/".$imagename;
$SmallImage = "images/breeds/".$trimmed['profile_id']."/thumbs/".$imagename;
//uploaded temp file
$file = $_FILES['new_image']['tmp_name'];
//Get Image size info
list($width, $height, $image_type) = getimagesize($file);
//SourceImage
switch ($image_type)
{
case 1: $image = imagecreatefromgif($file); break;
case 2: $image = imagecreatefromjpeg($file); break;
case 3: $image = imagecreatefrompng($file); break;
default: trigger_error('Unsupported filetype!', E_USER_WARNING); break;
}
// Constraints for Large Image
$max_width = 900;
$max_height = 600;
$ratioh = $max_height/$height;
$ratiow = $max_width/$width;
$ratio = min($ratioh, $ratiow);
if (($height < $max_height) && ($width < $max_width)) {
//keep same dimensions
$modwidth = $width;
$modheight = $height;
} else {
// New dimensions
$modwidth = intval($ratio*$width);
$modheight = intval($ratio*$height);
}
$tmpLarge = imagecreatetruecolor($modwidth, $modheight);
imagecopyresampled($tmpLarge, $image, 0, 0, 0, 0, $modwidth, $modheight, $width, $height) ;
// Add Watermark to large image at top right
$wm = "images/p4h-wm-200.png";
$wmImage = imagecreatefrompng($wm);
$wmW = imagesx($wmImage);
$wmH = imagesy($wmImage);
$photoW = imagesx($tmpLarge);
$photoH = imagesy($tmpLarge);
$dest_x = $photoW - $wmW - 10;
$dest_y = 10;
// imagecopymerge($tn, $wmImage, $dest_x, $dest_y, 0, 0, $wmW, $wmH, 100);
imagecopy($tmpLarge, $wmImage, $dest_x, $dest_y, 0, 0, $wmW, $wmH);
switch ($image_type)
{
case 1: imagegif($tmpLarge,$LargeImage); break;
case 2: imagejpeg($tmpLarge,$LargeImage, 80); break;
case 3: imagepng($tmpLarge,$LargeImage, 0); break;
default: trigger_error('Failed resize image!', E_USER_WARNING); break;
}
// Destroy tmp images to free memory
imagedestroy($tmpLarge);
imagedestroy($wmImage);
// Constraints for Normal Image
$max_width = 550;
$max_height = 413;
$ratioh = $max_height/$height;
$ratiow = $max_width/$width;
$ratio = min($ratioh, $ratiow);
if (($height < $max_height) && ($width < $max_width)) {
//keep same dimensions
$modwidth = $width;
$modheight = $height;
} else {
// New dimensions
$modwidth = intval($ratio*$width);
$modheight = intval($ratio*$height);
}
$tmpNormal = imagecreatetruecolor($modwidth, $modheight);
imagecopyresampled($tmpNormal, $image, 0, 0, 0, 0, $modwidth, $modheight, $width, $height) ;
// Add Watermark to large image at top right
$wm = "images/p4h-wm-150.png";
$wmImage = imagecreatefrompng($wm);
$wmW = imagesx($wmImage);
$wmH = imagesy($wmImage);
$photoW = imagesx($tmpNormal);
$photoH = imagesy($tmpNormal);
$dest_x = $photoW - $wmW - 10;
$dest_y = 10;
// imagecopymerge($tn, $wmImage, $dest_x, $dest_y, 0, 0, $wmW, $wmH, 100);
imagecopy($tmpNormal, $wmImage, $dest_x, $dest_y, 0, 0, $wmW, $wmH);
switch ($image_type)
{
case 1: imagegif($tmpNormal,$NormalImage); break;
case 2: imagejpeg($tmpNormal,$NormalImage, 90); break;
case 3: imagepng($tmpNormal,$NormalImage, 0); break;
default: trigger_error('Failed resize image!', E_USER_WARNING); break;
}
// Destroy tmp images to free memory
imagedestroy($tmpNormal);
imagedestroy($wmImage);
// Now that the full size image has been saved, resize the thumbnail one to a fixed size for homepage display
// Constraints
$thumb_width = 150;
$thumb_height = 112.5;
// Calculate stuff and resize image accordingly
$src_ratio = $width/$height;
$dst_ratio = $thumb_width/$thumb_height;
if($src_ratio < $dst_ratio) // trim top and bottom
{
$ratio = $width/$thumb_width;
$crop_height = $thumb_height*$ratio;
$src_y = round(($height-$crop_height)/2);
$crop_width = $width;
$src_x = 0;
}
else // trim left and right
{
$ratio = $height/$thumb_height;
$crop_width = $thumb_width*$ratio;
$src_x = round(($width-$crop_width)/2);
$crop_height = $height;
$src_y = 0;
}
$tmpSmall = imagecreatetruecolor($thumb_width, $thumb_height);
imagecopyresampled($tmpSmall, $image, 0, 0, $src_x, $src_y, $thumb_width, $thumb_height, $crop_width, $crop_height);
switch ($image_type)
{
case 1: imagegif($tmpSmall,$SmallImage); break;
case 2: imagejpeg($tmpSmall,$SmallImage, 90); break;
case 3: imagepng($tmpSmall,$SmallImage, 0); break;
default: trigger_error('Failed resize image!', E_USER_WARNING); break;
}
// Destroy images to free memory
imagedestroy($image);
imagedestroy($tmpSmall);
你是否在你完成它們之後摧毀/釋放圖像？你是否一次打開4張圖像，或者是連續創建，保存和銷燬？ – horatio 2012-03-01 15:57:07
發佈代碼可能會有所幫助。還有哪些庫/工具用於調整圖像大小？ – masnun 2012-03-01 15:59:32
請參閱我上面添加的代碼 – user1052096 2012-03-01 16:09:07