【发布时间】：2022-01-14 18:09:50
【问题描述】：
大家好，女士们，
我正在尝试上传图像并将其保存在数据库中。我的代码正在运行，但是当我对其进行测试时，图像将在三四次后部分保存，如下所示：
在我的代码中，我最多可以保存 12 张图片（如果已上传）。我正在测试 4 张图片。 我究竟做错了什么？是内存问题吗？如果是……是什么原因造成的？ 谢谢你的帮助。
我的代码是：
//save up to 12 images in database
for($i=1;$i<=12;$i++){
$fileName = $_FILES['image'.$i]['name'];
if ($fileName){
try{
list($origWidth, $origHeight, $type) = getimagesize($_FILES['image'.$i]['tmp_name']);
$temp_name = "tempupload/".$fileName;
//make thumbnail to save in database
//resize the image to 200px and save as/in $temp_name (see resizeImage function)
resizeImage($_FILES['foto'.$i]['tmp_name'], $temp_name, 200, 200);
//retrieve saved image to put a watermark on it
switch(strtolower(image_type_to_mime_type($type)))
{
case 'image/jpeg':
$im2 = @imagecreatefromjpeg($temp_name);
break;
case 'image/png':
$im2 = @imagecreatefrompng($temp_name);
break;
}
//put watermark
$watermark = imagecreatefrompng('../assets/images/logo/watermark.png');
$marge_right = 10;
$marge_bottom = 10;
$sx = imagesx($watermark);
$sy = imagesy($watermark);
imagecopy($im2, $watermark, imagesx($im2) - $sx - $marge_right, imagesy($im2) - $sy - $marge_bottom, 0, 0, imagesx($watermark), imagesy($watermark));
//save image with watermark
switch(strtolower(image_type_to_mime_type($type)))
{
case 'image/jpeg':
imagejpeg($im2, $temp_name);
break;
case 'image/png':
imagepng($im2, $temp_name);
break;
}
//open saved temp image
$saved_temp = fopen($temp_name,"rb");
//addslashes to image to save in database as BLOB
$image = addslashes(fread($saved_temp ,filesize($temp_name)));
fclose($saved_temp );
//End thumbnail
//Next part is to save the image in database in 1200px if user want this.
//this is used so that the user can download and use the image afterwards
$downloadimage="";
if(($_POST['image'.$i.'_Save']!="no") && ($_SESSION['package']!="A")){
//if width or height are smaller 700 us original width or height
$w = ($origWidth > 1200)?1200:$origWidth;
$h = ($origHeight > 1200)?1200:$origHeight;
if(($origWidth > 1200) || ($origHeight > 1200)){
//use same $temp_name to save memory????
resizeImage($_FILES['image'.$i]['tmp_name'], $temp_name, $w, $h,100);
}else{
//if image is to small, then move and save as $temp_name
move_uploaded_file($_FILES['image'.$i]["tmp_name"],$temp_name);
}
//put watermark
if(($_SESSION['package']=="B")){
// Get dimensions and type of $temp_name.
list($origWidth, $origHeight, $type) = getimagesize($temp_name);
switch(strtolower(image_type_to_mime_type($type)))
{
case 'image/jpeg':
$im2 = @imagecreatefromjpeg($temp_name);
break;
case 'image/png':
$im2 = @imagecreatefrompng($temp_name);
break;
}
imagecopy($im2, $watermark, imagesx($im2) - $sx - $marge_right, imagesy($im2) - $sy - $marge_bottom, 0, 0, imagesx($watermark), imagesy($watermark));
switch(strtolower(image_type_to_mime_type($type)))
{
case 'image/jpeg':
imagejpeg($im2, $temp_name);
break;
case 'image/png':
imagepng($im2, $temp_name);
break;
}
}
$saved_temp = fopen($temp_name,"rb");
$downloadimage = addslashes(fread($saved_temp ,filesize($temp_name)));
fclose($saved_temp );
}
//End making downloadimage
//SQL to save images in database
if(empty($downloadimage)){
$sql = "INSERT INTO tb_images(image,strange_id) VALUES (:image,:strange_id)";
$st = $conn->prepare($sql);
}else{
$sql = "INSERT INTO tb_images(image,strange_id,downloadimage,type) VALUES (:image,:strange_id,:downloadimage,:type)";
$st = $conn->prepare($sql);
$st->bindValue( ":downloadimage", $downloadimage, PDO::PARAM_LOB );
$st->bindValue( ":type", strtolower(image_type_to_mime_type($type)), PDO::PARAM_STR );
}
$st->bindValue( ":image", $image, PDO::PARAM_LOB );
$st->bindValue( ":strange_id", $strange_id, PDO::PARAM_INT );
$st->execute();
imagedestroy($watermark);
unlink($temp_name);
imagedestroy($im2);
}
catch (\Exception $e){
echo e;
}
}
}
调整大小功能
/**
* Resize image - preserve ratio of width and height.
* @param string $sourceImage path to source JPEG/PNG image
* @param string $targetImage path to final JPEG/PNG image file
* @param int $maxWidth maximum width of final image (value 0 - width is optional)
* @param int $maxHeight maximum height of final image (value 0 - height is optional)
* @param int $quality quality of final image (0-100)
* @return bool
*/
function resizeImage($sourceImage, $targetImage, $maxWidth, $maxHeight, $quality = 80)
{
$isValid = @getimagesize($sourceImage);
if (!$isValid)
{
return false;
}
// Get dimensions and type of source image.
list($origWidth, $origHeight, $type) = getimagesize($sourceImage);
if ($maxWidth == 0)
{
$maxWidth = $origWidth;
}
if ($maxHeight == 0)
{
$maxHeight = $origHeight;
}
// Calculate ratio of desired maximum sizes and original sizes.
$widthRatio = $maxWidth / $origWidth;
$heightRatio = $maxHeight / $origHeight;
// Ratio used for calculating new image dimensions.
$ratio = min($widthRatio, $heightRatio);
// Calculate new image dimensions.
$newWidth = (int)$origWidth * $ratio;
$newHeight = (int)$origHeight * $ratio;
// Create final image with new dimensions.
$newImage = imagecreatetruecolor($newWidth, $newHeight);
// Obtain image from given source file.
switch(strtolower(image_type_to_mime_type($type)))
{
case 'image/jpeg':
$image = @imagecreatefromjpeg($sourceImage);
if (!$image)
{
return false;
}
imagecopyresampled($newImage, $image, 0, 0, 0, 0, $newWidth, $newHeight, $origWidth, $origHeight);
if(imagejpeg($newImage,$targetImage,$quality))
{
// Free up the memory.
imagedestroy($image);
imagedestroy($newImage);
return true;
}
break;
case 'image/png':
$image = @imagecreatefrompng($sourceImage);
if (!$image)
{
return false;
}
imagecopyresampled($newImage, $image, 0, 0, 0, 0, $newWidth, $newHeight, $origWidth, $origHeight);
if(imagepng($newImage,$targetImage, floor($quality / 10)))
{
// Free up the memory.
imagedestroy($image);
imagedestroy($newImage);
return true;
}
break;
default:
return false;
}
}
【问题讨论】：
-
跳过所有调整大小和水印的东西，只做上传、数据库和查看。测试一堆。如果它总是有效，请添加调整大小并再次测试一堆。如果可行，请重新添加水印并重复。另外，删除
@错误抑制
标签： php image memory upload resize