Introduction to file upload through simple examples in PHP

A simple example of PHP file upload, obtain the file name, type, size and other related information, and complete the file upload for your reference.

1. Upload file code:

code

<&#63;php
//判断临时文件存放路径是否包含用户上传的文件
if(is_uploaded_file($_FILES["uploadfile"]["tmp_name"])){
//为了更高效，将信息存放在变量中
$upfile=$_FILES["uploadfile"];//用一个数组类型的字符串存放<strong>上传文件</strong>的信息
//print_r($upfile);//如果打印则输出类似这样的信息Array ( [name] => m.jpg [type] => image/jpeg [tmp_name] => C:\WINDOWS\Temp\php1A.tmp [error] => 0 [size] => 44905 )
$name=$upfile["name"];//便于以后转移文件时命名
$type=$upfile["type"];//<strong>上传文件</strong>的类型
$size=$upfile["size"];//<strong>上传文件</strong>的大小
$tmp_name=$upfile["tmp_name"];//用户<strong>上传文件</strong>的临时名称
$error=$upfile["error"];//上传过程中的错误信息
//echo $name;
//对文件类型进行判断，判断是否要转移文件,如果符合要求则设置$ok=1即可以转移
switch($type){
 case "image/jpg": $ok=1;
 <a href="http://www.jb51.net/zt/break/" target="_blank">break</a>;
 case "image/jpeg": $ok=1;
 break;
 case "image/gif" : $ok=1;
 break;
 default:$ok=0;
 break;
}
//如果文件符合要求并且上传过程中没有错误
if($ok&&$error=='0'){
 //调用move_uploaded_file（）函数，进行文件转移
 move_uploaded_file($tmp_name,'up/'.$name);
 //操作成功后，提示成功
 echo "<script language=\"<a href="http://www.jb51.net/js/" target="_blank">javascript</a>\">alert('succeed')</script>";
}else{
 //如果文件不符合类型或者上传过程中有错误，提示失败
 echo "<script language=\"javascript\">alert('failed')</script>";
}
 }
?>

2. Submit file form

code

<form enctype="multipart/form-data" method="post" name="uploadform">
<input type="file" name="uploadfile" value="Upload File">
<input type="submit" name="submit" value="Upload">
</form>

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