我有以下代碼需要從HTML <form>
$_POST
ed圖像並上載它們。然後重新調整它們的大小(最多兩次)並將這些較小的圖像保存到同一目錄中。釋放內存在圖像調整大小腳本(GD)
但是,在處理較大的文件時,內存不足。
我的問題不是「如何防止X錯誤發生?」,而是「如何釋放此腳本正在使用的內存以便它可以繼續?」
<?php
if (!isset($_POST['SiteID']) || !filter_var($_POST['SiteID'], FILTER_VALIDATE_INT)) {
header("Location: ./");
exit();
}
$SiteID = $_POST['SiteID'];
if (!isset($_POST['GalleryID']) || !filter_var($_POST['GalleryID'], FILTER_VALIDATE_INT)) {
header("Location: ./?SiteID=" . $SiteID . "&error=upload");
exit();
}
$GalleryID = $_POST['GalleryID'];
$ImageFile = $_FILES['ImageFile'];
$Extensions = array("jpg", "jpeg");
$Timestamp = date("U");
require_once("db.php");
for ($X = 0; $X < count($_FILES['ImageFile']['name']); $X++) {
$Extension = strtolower(pathinfo($ImageFile['name'][$X], PATHINFO_EXTENSION));
if (in_array($Extension, $Extensions)) {
if ($ImageFile['error'][$X] === UPLOAD_ERR_OK) {
if ($ImageFile['size'][$X] <= 5 * 1024 * 1024) {
$Filename = $GalleryID . "-" . $Timestamp . "-" . $X . "." . $Extension;
move_uploaded_file($ImageFile['tmp_name'][$X], "uploads/" . $Filename);
mysql_query("INSERT INTO NewGalleryImages SET GalleryID = $GalleryID, ImageFile = '$Filename', ImageCaption = ''");
$Dimensions = getimagesize("uploads/" . $Filename);
$Width = ($Dimensions[0] > 768 ? 768 : $Dimensions[0]);
$Height = ($Dimensions[1]/$Dimensions[0]) * $Width;
$Expl = explode(".", $Filename);
$LargeFilename = $Expl[0] . "_gallery." . $Expl[1];
$Source = "uploads/" . $Filename;
$Canvas = imagecreatetruecolor($Width, $Height);
$LargeImage = imagecreatefromjpeg($Source);
imagecopyresampled($Canvas, $LargeImage, 0, 0, 0, 0, $Width, $Height, $Dimensions[0], $Dimensions[1]);
imagejpeg($Canvas, "uploads/" . $LargeFilename, 100);
imagedestroy($Canvas);
$Width = 200;
$Height = ($Dimensions[1]/$Dimensions[0]) * $Width;
$Expl = explode(".", $Filename);
$ThumbFilename = $Expl[0] . "_thumb." . $Expl[1];
$Source = "uploads/" . $Filename;
$Canvas = imagecreatetruecolor($Width, $Height);
$ThumbImage = imagecreatefromjpeg($Source);
imagecopyresampled($Canvas, $ThumbImage, 0, 0, 0, 0, $Width, $Height, $Dimensions[0], $Dimensions[1]);
imagejpeg($Canvas, "uploads/" . $ThumbFilename, 100);
imagedestroy($Canvas);
} else {
mysql_close();
header("Location: ./?SiteID=" . $SiteID . "&error=size");
exit();
}
} else {
mysql_close();
header("Location: ./?SiteID=" . $SiteID . "&error=unknown");
exit();
}
} else {
mysql_close();
header("Location: ./?SiteID=" . $SiteID . "&error=type");
exit();
}
}
mysql_close();
header("Location: ./?SiteID=" . $SiteID . "&uploaded");
exit();
// var_dump($_POST);
// var_dump($_FILES);
// var_dump($ImageFile);
?>
我的PHP文件中讀到imagedestroy()
,並試圖增加在給我在幾個地方的腳本,但1)我不知道,我破壞了正確的資源,和2 )我不確定它實際上是在清理內存。
我目前擁有的服務器上的以下設置:
post_max_size = 64M
upload_max_filesize = 10M
max_input_time = 60
max_input_nesting_level = 64
max_execution_time = 120
memory_limit = 512M
max_input_vars = 1000
這是我收到錯誤消息:
Fatal error: Allowed memory size of 536870912 bytes exhausted
(tried to allocate 29440 bytes) in
/var/www/vhosts/example.com/httpsdocs/gallery-upload.php
on line 36
我發現了什麼奇怪的是,無論我有多increate memory_limit
,它需要分配的「額外」總是相同的:29440 bytes
。
如果我單獨上傳圖像,腳本運行正常,但一次上傳超過兩個將引發錯誤。超過512MB的內存大小調整兩個圖像似乎過度,不是嗎?還是它還沒有足夠的記憶?我不確定這個服務器可以騰出多少...! 如何減少我的總內存使用量?
也'imagedestroy($ ThumbImage)' – Marek
是的,我創建的每個圖像,謝謝。 – mpdc