This article mainly introduces the PHP move_uploaded_file() function, which actually moves the uploaded file to a new location. Friends who need it can refer to the
Definition and usage
move_uploaded_file() Function moves the uploaded file to a new location.
If successful, return true, otherwise return false.
Syntax
move_uploaded_file(file,newloc)
| Description | |
|---|---|
| Required. Specifies the files to be moved. | |
| Required. Specifies the new location of the file. |
Tips and Notes
Note: This function is only used for files uploaded via HTTP POST. Note: If the target file already exists, it will be overwritten.Security Supplement
Introduction from w3c, let’s talk about the problems I encountered. Generally speaking, we will write the save file like this:$fileName = $_SERVER['DOCUMENT_ROOT'].'/Basic/uploads/'.$_FILES['file']['name']; move_uploaded_file($_FILES['file']['tmp_name'],$fileName )
Okay, now the risk is here:
Supplement:
There are two parameters. The first parameter is the temporary file name after you upload it, which is automatically generated by the system. Usually the style is: $_FILE["file"]["tmp_name"]; where file is the name of your front-end file upload form.The second parameter is the new file name containing the path. For example:
move_uploaded_file() function example
Use the move_uploaded_file() function to upload files to the server.
<?php
$tmp_filename = $_FILES['myupload']['tmp_name'];
if(!move_uploaded_file($tmp_filename,"/path/to/dest/{$_FILES['myupload']['name']}")) {
echo "An error has occurred moving the uploaded file.<BR>";
echo "Please ensure that if safe_mode is on that the " . "UID PHP is using matches the file.";
exit;
} else {
echo "The file has been successfully uploaded!";
}
?>move_uploaded_file File upload failure case and solution
Today, when implementing a PHP script that uploads an avatar image file when a user registers, a problem occurred: php The script code is as follows:<?php
define('ROOT',dirname(__FILE__).'/');
if ($_FILES["file"]["error"] > 0)
{
echo "Return Code: " . $_FILES["file"]["error"] . "<br />";
}
else
{
echo "Upload: " . $_FILES["file"]["name"] . "<br />";
echo "Type: " . $_FILES["file"]["type"] . "<br />";
echo "Size: " . ($_FILES["file"]["size"] / 1024) . " Kb<br />";
echo "Temp file: " . $_FILES["file"]["tmp_name"] . "<br />";
if (file_exists("upload/" . $_FILES["file"]["name"]))
{
echo $_FILES["file"]["name"] . " already exists. ";
}
else
{
if(is_uploaded_file($_FILES['file']['tmp_name'])){
$stored_path = ROOT.'/upload/'.basename($_FILES['file']['name']);
if(move_uploaded_file($_FILES['file']['tmp_name'],$stored_path)){
echo "Stored in: " . $stored_path;
}else{
echo 'Stored failed:file save error';
}
}else{
echo 'Stored failed:no post ';
}
}
}
?>PHP Development Learning File Upload (move_uploaded_file)
Function: Move the uploaded temporary file to the upload directory. Upload has been created in the root directory! ! !<form action="" enctype="multipart/form-data" method="post"
name="uploadfile">上传文件：<input type="file" name="upfile" /><br>
<input type="submit" value="上传" /></form>
<?php
//print_r($_FILES["upfile"]);
if(is_uploaded_file($_FILES['upfile']['tmp_name'])){
$upfile=$_FILES["upfile"];
//获取数组里面的值
$name=$upfile["name"];//上传文件的文件名
$type=$upfile["type"];//上传文件的类型
$size=$upfile["size"];//上传文件的大小
$tmp_name=$upfile["tmp_name"];//上传文件的临时存放路径
//判断是否为图片
switch ($type){
case 'image/pjpeg':$okType=true;
break;
case 'image/jpeg':$okType=true;
break;
case 'image/gif':$okType=true;
break;
case 'image/png':$okType=true;
break;
}
if($okType){
/**
* 0:文件上传成功<br/>
* 1：超过了文件大小，在php.ini文件中设置<br/>
* 2：超过了文件的大小MAX_FILE_SIZE选项指定的值<br/>
* 3：文件只有部分被上传<br/>
* 4：没有文件被上传<br/>
* 5：上传文件大小为0
*/
$error=$upfile["error"];//上传后系统返回的值
echo "================<br/>";
echo "上传文件名称是：".$name."<br/>";
echo "上传文件类型是：".$type."<br/>";
echo "上传文件大小是：".$size."<br/>";
echo "上传后系统返回的值是：".$error."<br/>";
echo "上传文件的临时存放路径是：".$tmp_name."<br/>";
echo "开始移动上传文件<br/>";
//把上传的临时文件移动到upload目录下面(upload是在根目录下已经创建好的！！！)
move_uploaded_file($tmp_name,"upload/".$name);
$destination="upload/".$name;
echo "================<br/>";
echo "上传信息：<br/>";
if($error==0){
echo "文件上传成功啦！";
echo "<br>图片预览:<br>";
echo "<img src=".$destination.">";
//echo " alt=\"图片预览:\r文件名:".$destination."\r上传时间:\">";
}elseif ($error==1){
echo "超过了文件大小，在php.ini文件中设置";
}elseif ($error==2){
echo "超过了文件的大小MAX_FILE_SIZE选项指定的值";
}elseif ($error==3){
echo "文件只有部分被上传";
}elseif ($error==4){
echo "没有文件被上传";
}else{
echo "上传文件大小为0";
}
}else{
echo "请上传jpg,gif,png等格式的图片！";
}
}
?>
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