Optimized single-File upload function

$fileInfo  = @$_files [' myFile '];//receive form uploaded files//5 parameters, the first one is must, followed by default values upload ($fileInfo, "626800", False, "IMGs", Array ("TXT")); Function upload ($fileInfo, $maxSize =2097152, $flag =true, $path = "Upload", $ Allowedext=array ("JPEG", "JPG", "png", "GIF"))  {//$maxSize  = 2 * 1024 * 1024;  //  upload file size limit within 2M//$flag  = true;//  Judging error number if  ($fileInfo  [' ERROR '] >  0)  {switch  ($fileInfo  [' error ')  {case 1 : $mes  =  ' The upload file exceeds the value of the upload_max_filesize option in the PHP configuration file '; break;case 2 : $mes  =  ' upload file exceeds the size of the form max_file_size limit ' ; break;case 3&nbsp: $mes  =  ' files are uploaded '; break;case 4 : $mes  =  ' no files selected for upload '; BREAK;CASE 6&NBSP: $mes  =  ' no temporary directory found '; break;case 7 :case 8 : $mes  =   ' system error '; exit  (  $mes  );}   Determine the file type//  $ext =strtolower (End (Explode (".",  $fileInfo [' name ']));  //get the suffix name, or use the following method $EXT&Nbsp;= pathinfo  (  $fileInfo  [' name '], pathinfo_extension );//  $allowedExt  = array  (//  "jpeg",//  "jpg",//  "png",//  "GIF"  // )//if (!is_ Array ($ALLOWEDEXT)) {exit ("The file name extension is not an array");} if  (! in_array  (  $ext,  $allowedExt  ))  {exit  (  "Illegal file type"  );}  print_r (getimagesize ($fileInfo [' tmp_name '));exit;//  determine if it is the true picture file type, if you do not need to do this detection can be set $flag for Falseif   ($flag)  {if  (! getimagesize  (  $fileInfo  [' tmp_name '] ))  {exit   (  "Upload file is not a real picture file"  );}}   Determine file size if  ($fileInfo  [' size '] >  $maxSize)  {exit  (  "Upload file size exceeds this site limit"  );} Whether   is uploading via post, it is necessary to detect the temporary file// var_dump (is_uploaded_file ($fileInfo [' tmp_name '));exit;if  (!  is_uploaded_file  (  $fileInfo  [' tmp_name '] )  {exit  (  "Illegal upload method"  );}   Move files after detection//$path  =  "upload";if (! file_exists  (  $path  ))  {mkdir  (  $path, 0755, true ) chmod   (  $path, 0755 );} $uniqName =md5  ( uniqid  ( microtime  ( true ), true )  )  .   "."  .  $ext $destination  =  $path  .  "/"  .  $uniqName;if  (!  @move_ uploaded_file  (  $fileInfo  [' tmp_name '],  $destination  ))  {//  plus @  is to not display overflow error exit  (  "File upload failed"  );} echo  "File Upload successful! ";}

This article is from a "sense of direction" blog, be sure to keep this source http://itech.blog.51cto.com/192113/1606734

Optimized single-File upload function