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[英]creating thumbnails on image upload - 'SOME' are black, yet others are ok
[英]Image upload form works for some but not others?
我有一個很棒的圖片上傳表格! 對我來說...似乎幾乎每個人都會出錯! 這到底是怎么回事? (我知道我的程序草率,我不是在找批評,只是快速解決!請幫助。)
形成:
<form enctype="multipart/form-data" action="imgupload.php" method="POST">
Image upload:
<input name="uploadedfile" type="file" />
<input type="submit" value="Upload" />
</form>
表單處理程序:
<?php
if (($_FILES["uploadedfile"]["type"] == "image/jpeg")
&& ($_FILES["uploadedfile"]["size"] < 4000000))
{
// Where the file is going to be placed
$target_path = "/images/";
/* Add the original filename to our target path.
Result is "images/filename.extension" */
//////////RENAME FILE/////////////
$filetype = pathinfo($_FILES['uploadedfile']['name'], PATHINFO_EXTENSION);
$oldtitle = $_FILES["uploadedfile"]["name"];
$take_file_extension = substr($oldtitle, 0, strrpos($oldtitle, '.'));
$title = "jeep_".$take_file_extension.".".$filetype;
$target_path = $target_path . $title;
if(move_uploaded_file($_FILES['uploadedfile']['tmp_name'], $target_path)) {
echo "The picture ". basename( $_FILES['uploadedfile']['name']).
" has been uploaded<br><br>----------------<br><br>";
echo "Upload: " . $_FILES["uploadedfile"]["name"] . "<br>";
echo "Size: " . ($_FILES["uploadedfile"]["size"] / 1024) . " Kb<br>";
}
}
else
{
echo "There is a file size limit of 1MB. Only JPG's can be uploaded!";
}
?>
每次都能為我工作,其他人都會得到“文件大小限制為1MB。只能上傳JPG!” 錯誤。
即使您的代碼設置為接受最大4MB的圖像,您也必須通過編輯一些php.ini設置的值來告訴PHP允許這種大小的圖像:
您之所以只能上傳.jpg圖片,是因為您的條件僅限於.jpg:
if (($_FILES["uploadedfile"]["type"] == "image/jpeg")
嘗試切換:
switch ($_FILES["uploadedfile"]["type"]) {
case 'image/jpeg':
case 'image/png':
break;
default:
throw new Exception('Invalid image type');
}
我想知道這是否是您在php.ini中的max_execution_time。 嘗試更改為30以上。
http://www.php.net/manual/zh/info.configuration.php#ini.max-execution-time
較慢的(較低的帶寬)連接可能需要較長的時間才能上傳較大的圖像,導致其出錯,因此連接速度可能更快。
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