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? ??? ?? PHP ???? PHP ?? ???? ??? ??, PHP ?? ???? ?? ???

PHP ?? ???? ??? ??, PHP ?? ???? ?? ???

Jul 25, 2016 am 08:51 AM

  3. /*

  4. * 功 能: 文件下載
  5. */
  6. /**
  7. * 使用方法:$download = new Download();
  8. * //設(shè)置參數(shù)
  9. * $download->set_file_dir("c:/");
  10. * $download->set_file_name("boot.ini");
  11. * $download->set_read_bytes(1024);
  12. * //文件下載處理操作
  13. * $download->deal_with();
  14. * //判斷文件是否存在
  15. * if($download->is_file_exist()){
  16. *echo "file_exist";
  17. *}else{
  18. *echo "file_not_exist";
  19. *}
  20. */
  21. class Download {
  22. private $file = null;//文件句柄
  23. private $file_dir = "";//文件所在的目錄
  24. private $file_name = "";//文件名稱
  25. private $file_exist = false;//表示文件是否存在, 缺省為不存在
  26. private $read_bytes = 0;//文件讀取字節(jié)數(shù)
  27. private $mode = "r";//文件的訪問類型

  28. public function __construct(){

  29. }

  30. public function __destruct(){

  31. if(null != $this->file){
  32. fclose($this->file);
  33. }
  34. }

  35. /**

  36. * 文件下載處理的操作
  37. */ bbs.it-home.org
  38. public function deal_with(){
  39. //文件全路徑
  40. $file_path = $this->file_dir . $this->file_name;

  41. //檢查文件是否存在

  42. if (file_exists($file_path)) {
  43. $this->file_exist = true;

  44. // 打開文件

  45. $this->file = fopen($file_path, $this->mode);

  46. // 輸入文件標(biāo)簽

  47. Header("Content-type: application/octet-stream");
  48. Header("Accept-Ranges: bytes");
  49. Header("Accept-Length: " . filesize($file_path));
  50. Header("Content-Disposition: attachment; filename=" . $this->file_name);

  51. // 輸出文件內(nèi)容

  52. while(!feof($this->file))
  53. {
  54. $out = fread($this->file, $this->read_bytes);
  55. if(!get_magic_quotes_gpc())
  56. {
  57. echo $out;
  58. }
  59. else
  60. {
  61. echo stripslashes($out);
  62. }
  63. }
  64. //echo fread($file, filesize($file_dir . $file_name));
  65. }
  66. }

  67. /**

  68. * 返回值為 true 或 false, 通過其值判斷文件是否存在
  69. */
  70. public function is_file_exist(){
  71. return $this->file_exist;
  72. }

  73. /**

  74. * 參數(shù)類型為字符串
  75. */
  76. public function set_file_dir($file_dir=""){
  77. $this->file_dir = $file_dir;
  78. }

  79. /**

  80. * 參數(shù)類型為字符串
  81. */
  82. public function set_file_name($file_name=""){
  83. $this->file_name = $file_name;
  84. }

  85. /**

  86. * 參數(shù)類型為整型
  87. */
  88. public function set_read_bytes($read_bytes=1024){
  89. $this->read_bytes = $read_bytes;
  90. }
  91. }
  92. ?>

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