我有一个简单的脚本,可以在我的服务器上传文件并将详细信息插入数据库。
使用下面的代码,我收到两个错误..
“注意:未定义的变量:sExt in”.. 我尝试用if语句解决问题,但没有成功..
如果上传文件为空,则将数字导入数字(1,2,3 ...)到Mysql中.... 我尝试使用下面的代码解决问题,但也没有成功..
“如果($ _ FILES [ '文件'] [ '名称']!=” “)” ...
有什么建议吗?
谢谢..
我的代码:
<?php
include_once('db.php');
if (isset($_FILES['files'])) {
$uploadedFiles = array();
foreach ($_FILES['files']['tmp_name'] as $key => $tmp_name) {
$errors = array();
$file_name = md5(uniqid("") . time());
$file_size = $_FILES['files']['size'][$key];
$file_tmp = $_FILES['files']['tmp_name'][$key];
$file_type = $_FILES['files']['type'][$key];
if($file_type == "image/gif"){
$sExt = ".gif";
} elseif($file_type == "image/jpeg" || $file_type == "image/pjpeg"){
$sExt = ".jpg";
} elseif($file_type == "image/png" || $file_type == "image/x-png"){
$sExt = ".png";
}
if (!in_array($sExt, array('.gif','.jpg','.png'))) {
$errors[] = "Image types alowed are (.gif, .jpg, .png) only!";
}
if ($file_size > 2097152000) {
$errors[] = 'File size must be less than 2 MB';
}
$query = "INSERT into user_pics (`person_id`,`pic_name`,`pic_type`) VALUES('1','$file_name','$sExt')";
$result = mysqli_query($link,$query);
$desired_dir = "user_data/";
if (empty($errors)) {
if (is_dir($desired_dir) == false) {
mkdir("$desired_dir", 0700);
}
if (move_uploaded_file($file_tmp, "$desired_dir/" . $file_name . $sExt)) {
$uploadedFiles[$key] = array($file_name . $sExt, 1);
} else {
echo "Files Uploaded !" . $_FILES['files']['name'][$key];
$uploadedFiles[$key] = array($_FILES['files']['name'][$key], 0);
}
} else {
print_r($errors);
}
}
foreach ($uploadedFiles as $key => $row) {
if (!empty($row[1])) {
$codestr = '$file' . ($key+1) . ' = $row[0];';
eval ($codestr);
} else {
$codestr = '$file' . ($key+1) . ' = NULL;';
eval ($codestr);
}
}
}
?>
<form action="" method="POST" enctype="multipart/form-data">
<input type="file" name="files[]" accept="image/*"> <br/>
<input type="file" name="files[]" accept="image/*"> <br/><br/>
<input type="submit"/>
</form>
答案 0 :(得分:1)
而不是
if($file_type == "image/gif"){
$sExt = ".gif";
} elseif($file_type == "image/jpeg" || $file_type == "image/pjpeg"){
$sExt = ".jpg";
} elseif($file_type == "image/png" || $file_type == "image/x-png"){
$sExt = ".png";
}
if (!in_array($sExt, array('.gif','.jpg','.png'))) {
$errors[] = "Image types alowed are (.gif, .jpg, .png) only!";
}
你应该做
if($file_type == "image/gif"){
$sExt = ".gif";
} elseif($file_type == "image/jpeg" || $file_type == "image/pjpeg"){
$sExt = ".jpg";
} elseif($file_type == "image/png" || $file_type == "image/x-png"){
$sExt = ".png";
}else{
$errors[] = "Image types alowed are (.gif, .jpg, .png) only!";
}
检查您正在设置的扩展名是多余的,这可以通过提供默认值(使用else)来避免在未设置变量$sExt
时出现错误。这应该给你想要的行为。
我也会移动这些行
$query = "INSERT into user_pics (`person_id`,`pic_name`,`pic_type`) VALUES('1','$file_name','$sExt')";
$result = mysqli_query($link,$query);
$desired_dir = "user_data/";
if (empty($errors)) {
到此代码块的内部
if (empty($errors)) {
$query = "INSERT into user_pics (`person_id`,`pic_name`,`pic_type`) VALUES('1','$file_name','$sExt')";
$result = mysqli_query($link,$query);
$desired_dir = "user_data/";
这样当你遇到错误时你就不会插入...
不确定此
的目的 foreach ($uploadedFiles as $key => $row) {
if (!empty($row[1])) {
$codestr = '$file' . ($key+1) . ' = $row[0];';
eval ($codestr);
} else {
$codestr = '$file' . ($key+1) . ' = NULL;';
eval ($codestr);
}
}
但是eval可能非常糟糕,我建议采用另一种方式,例如使用数组,但这可能可以在第一个循环中完成。例如,null
或false
值可能位于empty($errors)
检查的else部分中,因此如果出现错误,则会将其置于false状态。
$files = array();
foreach ($uploadedFiles as $key => $row) {
if (!empty($row[1])) {
$files['$file' . ($key+1)] = $row[0];
} else {
$files['$file' . ($key+1)] = false; //id use false instead of null in an array
}
}
你也应该小心sql注入,虽然看起来你正在设置变量,但是为了防止后面的更改,使用准备好的查询仍然是明智的,这可能会让你受到SQL注入攻击。
答案 1 :(得分:0)
和
// double slash
if (move_uploaded_file($file_tmp, "$desired_dir/" . $file_name . $sExt)) {
// file was successfuly moved
echo "Files Uploaded !" . $_FILES['files']['name'][$key];
$uploadedFiles[$key] = array($file_name . $sExt, 1);
} else {
$uploadedFiles[$key] = array($_FILES['files']['name'][$key], 0);
}
foreach ($uploadedFiles as $key => $row) {
if ($row[1]) { // $row[1] is never empty
${'file' . ($key+1)} = $row[0];
} else {
${'file' . ($key+1)} = NULL;
}
}
更好的是:
if (move_uploaded_file($file_tmp, "$desired_dir/" . $file_name . $sExt)) {
echo "Files Uploaded !" . $_FILES['files']['name'][$key];
$uploadedFiles[] = $file_name . $sExt;
}
//instead of variable $file1 etc..
foreach($uploadedFiles as $filename){
}