Encapsulation of PHP single file upload function-PHP Tutorial-php.cn

Encapsulation of PHP single file upload function

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Release： 2016-07-25 08:43:27

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//Encapsulation of single file upload function
//Principle of file upload: Upload client files to the server, and then move the temporary files on the server to the specified directory.
//Direction of the file: Client -> Server (temporary file) -> Specify the directory. When the file enters the server, it becomes a temporary file. At this time, the name of the temporary file tmp_name should be used in the operation.
//It is unsafe to set upload file restrictions (file type and size) on the client because customers can modify the restrictions through source code, so set restrictions here on the server.
//Set encoding to UTF-8 to avoid Chinese garbled characters
header('Content-Type: text/html;charset=utf-8');
//Receive uploaded file information through $_FILES
$fileInfo = $ _FILES['myFile'];
function uploadFile($fileInfo,$uploadPath='uploads',$flag=true,$allowExt=array('jpeg','jpg','png','gif'),$maxSize = 2097152){
//Judge the error number, it can only be 0 or UPLOAD_ERR_OK, no error occurs, the upload is successful
if($fileInfo['error']>0){
//Attention! The error message is no 5
switch($fileInfo['error']){
case 1:
$mes= 'The uploaded file exceeds the value of the upload_max_filesize option in the PHP configuration file';
break;
case 2:
$mes= 'Exceeded the size of the HTML form MAX_FILE_SIZE limit';
break;
case 3:
$mes= 'The file was partially uploaded';
break;
case 4:
$mes= 'No option to upload the file';
break;
case 6:
$mes= 'Temporary directory not found';
break;
case 7:
$mes= 'File writing failed';
break;
case 8:
$mes= 'The uploaded file was deleted by PHP Extension program break';
break;
}
exit($mes);
}
$ext=pathinfo($fileInfo['name'],PATHINFO_EXTENSION);
//$allowExt=array('jpeg',' jpg','png','gif');
//Detect the type of uploaded file
if(in_array($ext,$allowExt)){
exit('illegal file type');
}
// Check whether the file size of the uploaded file meets the specification
//$maxSize = 2097152;//2M
if($fileInfo['size']>$maxSize){
exit('The uploaded file is too large');
}
//Check whether the picture is a real picture type
//$flag=true;
if($flag){
if(!getimagesize($fileInfo['tmp_name'])){
exit('not a real picture Type');
}
}
//Check whether it is uploaded through HTTP POST
if(!is_uploaded_file($fileInfo['tmp_name'])){
exit('The file is not uploaded through HTTP POST ');
}
//$uploadPath='uploads';
//If there is no such folder, create one
if(!file_exists($uploadPath)){
mkdir( $uploadPath, 0777, true) ;
chmod( $uploadPath, 0777 );
}
//The new file name is unique
$uniName = md5 ( uniqid( microtime(true),true) ).'.'.$ext;
$destination = $uploadPath. '/'.$uniName;
//The @ symbol is to prevent customers from seeing error messages
if(! @move_uploaded_file($fileInfo['tmp_name'], $destination )){
exit('File move failed') ;
}
//echo 'File uploaded successfully';
//return array(
// 'newName'=>$destination,
// 'size'=>$fileInfo['size'],
// 'type'=>$fileInfo['type']
//);
return $destination;
}
?>

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File upload, PHP