[英]How to Upload images into folder directory on the server using php
我正在尝试将图像上传到服务器。
在服务器上,文件夹名称:{photo}
我检查了该文件夹及其当前在0755上的权限。
当我运行我的PHP代码时,出现以下错误代码:
“上传文件时出错-检查目标位置是否可写。”
与我的问题类似的帖子是: 如何将照片上传到我的托管服务器文件夹目录
但我的代码中已经包含以下功能:
这是我的php代码:
<?php
$filetmp = $_FILES["file_img"]["tmp_name"];
$filename = $_FILES["file_img"]["name"];
$filetype = $_FILES["file_img"]["type"];
$filesize = $_FILES["file_img"]["size"];
$fileinfo = getimagesize($_FILES["file_img"]["tmp_name"]);
$filewidth = $fileinfo[0];
$fileheight = $fileinfo[1];
$filepath = "../photo/".$filename;
$filepath_thumb = "../photo/thumb/".$filename;
if($_POST['btn_upload'])
{
$sPhotoFileName = $filename;
$nPhotoSize = $filesize;
$sTempFileName = $filetmp;
chmod($filepath_thumb,0755);
chmod($filepath,0755);
if(file_exists('photo/' . $_FILES['file_img']['name'])){
die('File with that name already exists.');
}else{
if ($sPhotoFileName) // file uploaded
{ $aFileNameParts = explode(".", $sPhotoFileName);
$sFileExtension = end($aFileNameParts); // part behind last dot
if ($sFileExtension != "jpg"
&& $sFileExtension != "png"
&& $sFileExtension != "gif")
{ die ("Choose a JPG for the photo");
}
}
if($_FILES['file_img']['error'] > 0){
die('An error ocurred when uploading.');
}
if ($nPhotoSize == 0)
{ die ("Sorry. The upload of $sPhotoFileName has failed.
Search a photo smaller than 300K, using the button.");
}
if ($nPhotoSize > 30240000000)
{ die ("Sorry.
The file $sPhotoFileName is larger than 300K.
Advice: reduce the photo using a drawing tool.");
}
// read photo
$oTempFile = fopen($sTempFileName, "r");
$sBinaryPhoto = fread($oTempFile, fileSize($sTempFileName));
// Try to read image
$nOldErrorReporting = error_reporting(E_ALL & ~(E_WARNING)); // ingore warnings
$oSourceImage = imagecreatefromstring($sBinaryPhoto); // try to create image
error_reporting($nOldErrorReporting);
if (!$oSourceImage) // error, image is not a valid jpg
{ die ("Sorry.
It was not possible to read photo $sPhotoFileName.
Choose another photo in JPG format.");
}
}
$nWidth = imagesx($oSourceImage); // get original source image width
$nHeight = imagesy($oSourceImage); // and height
// create small thumbnail
$nDestinationWidth = 80;
$nDestinationHeight = 60;
//$oDestinationImage = imagecreatetruecolor($nDestinationWidth, $nDestinationHeight);
$oDestinationImage = imagecreate($nDestinationWidth, $nDestinationHeight);
/*$oResult = imagecopyresampled(
$oDestinationImage, $oSourceImage,
0, 0, 0, 0,
$nDestinationWidth, $nDestinationHeight,
$nWidth, $nHeight); // resize the image
*/
imagecopyresized($oDestinationImage, $oSourceImage,0, 0, 0, 0,$nDestinationWidth, $nDestinationHeight,$nWidth, $nHeight); // resize the image
ob_start(); // Start capturing stdout.
imageJPEG($oDestinationImage); // As though output to browser.
$sBinaryThumbnail = ob_get_contents(); // the raw jpeg image data.
ob_end_clean(); // Dump the stdout so it does not screw other output.
// attempt insert query execution
$sql = "INSERT INTO UploadImg (img_name, img_path, img_type) VALUES ('$sPhotoFileName', '$filepath', '$filetype')";
if(mysqli_query($link, $sql)){
echo "Records added successfully.";
} else{
echo "ERROR: Could not able to execute $sql. " . mysqli_error($link);
}
if(!move_uploaded_file($_FILES["file_img"]["tmp_name"],"../photo/".$_FILES["file_img"]["name"])){
die('Error uploading file - check destination is writeable.');
echo "Error Code: " .$_FILES["file_img"]["name"] . "<br>";
}else{
$sBinaryThumbnail = addslashes($sBinaryThumbnail);
$oDatabase = $link;
mysqli_select_db("upload", $oDatabase);
$sQuery = "insert into Uploadimg (thumbnail) VALUES ('$sBinaryThumbnail')";
echo $sQuery;
mysqli_query($sQuery, $oDatabase);
die('File uploaded successfully.');
mysqli_close($link);
}
}
?>
现在,我读到一篇文章说,即使您的文件夹权限设置为在这三个级别上都可以进行所有三个读,写和执行。 代码仍然无法读取,具体取决于服务器上的设置。
因此,我很困惑,需要澄清。 请帮我吗?
您可以通过编码的二进制数据上传图像,并将图像格式的文件保存在服务器上。
755表示它不是世界可写的。 您可以使用777将其设置为可写和可执行。
这仍然很容易受到攻击,因为任何有权访问您的服务器操作系统的人都可以写入该文件夹,因此您可能应该仅使Web服务器用户成为该文件夹的所有者,并保留当前的权限。 如果您正在运行apache,则用户通常是www-data或apache。
我发现您必须设置GID和UID权限文件权限
设置的组标识GID允许所有者执行所有应用程序以读取,写入和拉出文件夹。
与用户标识UID相同。 问题是您的文件夹将向陌生人开放,但可以使用。
我的图像正在上传到文件夹中。 告诉我你们在想什么?
首先在您的php.ini中放
file_uploads = On
接下来,创建一个HTML表单,该表单允许用户选择他们要上传的图像文件:
<form action="upload.php" method="post" enctype="multipart/form-data">
Select image to upload:
<input type="file" name="fileToUpload" id="fileToUpload">
<input type="submit" value="Upload Image" name="submit">
确保表单使用method =“ post”,然后使用下面的php代码上传图片
<?php $target_dir = "uploads/"; $target_file = $target_dir . basename($_FILES["fileToUpload"]["name"]); $uploadOk = 1; $imageFileType = pathinfo($target_file,PATHINFO_EXTENSION); // Check if image file is a actual image or fake image if(isset($_POST["submit"])) { $check = getimagesize($_FILES["fileToUpload"]["tmp_name"]); if($check !== false) { echo "File is an image - " . $check["mime"] . "."; $uploadOk = 1; } else { echo "File is not an image."; $uploadOk = 0; } } ?>
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