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Encapsulation of PHP single file upload function

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2016-07-25 08:43:271148browse
  1. //Encapsulation of single file upload function
  2. //Principle of file upload: Upload client files to the server, and then move the temporary files on the server to the specified directory.
  3. //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.
  4. //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.
  5. //Set encoding to UTF-8 to avoid Chinese garbled characters
  6. header('Content-Type: text/html;charset=utf-8');
  7. //Receive uploaded file information through $_FILES
  8. $fileInfo = $ _FILES['myFile'];
  9. function uploadFile($fileInfo,$uploadPath='uploads',$flag=true,$allowExt=array('jpeg','jpg','png','gif'),$maxSize = 2097152){
  10. //Judge the error number, it can only be 0 or UPLOAD_ERR_OK, no error occurs, the upload is successful
  11. if($fileInfo['error']>0){
  12. //Attention! The error message is no 5
  13. switch($fileInfo['error']){
  14. case 1:
  15. $mes= 'The uploaded file exceeds the value of the upload_max_filesize option in the PHP configuration file';
  16. break;
  17. case 2:
  18. $mes= 'Exceeded the size of the HTML form MAX_FILE_SIZE limit';
  19. break;
  20. case 3:
  21. $mes= 'The file was partially uploaded';
  22. break;
  23. case 4:
  24. $mes= 'No option to upload the file';
  25. break;
  26. case 6:
  27. $mes= 'Temporary directory not found';
  28. break;
  29. case 7:
  30. $mes= 'File writing failed';
  31. break;
  32. case 8:
  33. $mes= 'The uploaded file was deleted by PHP Extension program break';
  34. break;
  35. }
  36. exit($mes);
  37. }
  38. $ext=pathinfo($fileInfo['name'],PATHINFO_EXTENSION);
  39. //$allowExt=array('jpeg',' jpg','png','gif');
  40. //Detect the type of uploaded file
  41. if(in_array($ext,$allowExt)){
  42. exit('illegal file type');
  43. }
  44. // Check whether the file size of the uploaded file meets the specification
  45. //$maxSize = 2097152;//2M
  46. if($fileInfo['size']>$maxSize){
  47. exit('The uploaded file is too large');
  48. }
  49. //Check whether the picture is a real picture type
  50. //$flag=true;
  51. if($flag){
  52. if(!getimagesize($fileInfo['tmp_name'])){
  53. exit('not a real picture Type');
  54. }
  55. }
  56. //Check whether it is uploaded through HTTP POST
  57. if(!is_uploaded_file($fileInfo['tmp_name'])){
  58. exit('The file is not uploaded through HTTP POST ');
  59. }
  60. //$uploadPath='uploads';
  61. //If there is no such folder, create one
  62. if(!file_exists($uploadPath)){
  63. mkdir( $uploadPath, 0777, true) ;
  64. chmod( $uploadPath, 0777 );
  65. }
  66. //The new file name is unique
  67. $uniName = md5 ( uniqid( microtime(true),true) ).'.'.$ext;
  68. $destination = $uploadPath. '/'.$uniName;
  69. //The @ symbol is to prevent customers from seeing error messages
  70. if(! @move_uploaded_file($fileInfo['tmp_name'], $destination )){
  71. exit('File move failed') ;
  72. }
  73. //echo 'File uploaded successfully';
  74. //return array(
  75. // 'newName'=>$destination,
  76. // 'size'=>$fileInfo['size'],
  77. // 'type'=>$fileInfo['type']
  78. //);
  79. return $destination;
  80. }
  81. ?>
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File upload, PHP


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