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Home Backend Development PHP Tutorial PHP file operations

PHP file operations

Jul 25, 2016 am 08:42 AM
  2. //filetype()
  3. Get the file type
  4. //Get the file type under windows
  5. echo filetype("D:\lamp\php5\php.ini")."< br>";
  6. //Output file means it is a normal file
  7. echo filetype("D:\lamp\php5")."
    ";
  8. //Output dir means it is a directory
  9. //is_file()
  10. Determine whether the given file name is a normal file
  11. //is_dir()
  12. Determine whether the given file name is a directory
  13. //file_exists()
  14. Check whether the file or directory exists
  15. //filesize()
  16. Get The size of the file
  17. //is_readable()
  18. Determine whether the given file name is readable
  19. //is_writable()
  20. Determine whether the given file name is writable
  21. //is_executable()
  22. Determine whether the given file name is executable
  23. //filectime()
  24. Get the creation time of the file
  25. //filemtime()
  26. Get the modification time of the file
  27. //fileatime()
  28. Get the access time of the file
  29. //stat()
  30. Get most of the attribute values ????of the file
  32. //clearstatcache()
  33. Clear the file information cached by PHP
  34. /*
  35. *Declare a function to get most of the attributes of the file by passing in a file name
  36. **/
  37. function getFilePro($fileName){
  38. if(!file_exists($fileName)){
  39. //If the provided file or directory does not exist, exit the function directly
  40. echo "The target file does not exist"."
    ";
  41. return;
  42. }
  43. if(is_file($fileName)){
  44. //Determine whether the given file is an ordinary file
  45. echo $fileName."Is an ordinary file
    ";
  46. }
  47. if(is_dir($fileName) ){
  48. //Determine whether the given file is a directory
  49. echo $fileName." is a directory
    ";
  50. }
  51. echo "File type:".getFileType($fileName)."< br />";
  52. echo "File size:".getFileSize(filesize($fileName))."
    ";
  53. if(is_readable($fileName)){
  54. //Determine whether the file is readable
  55. echo "The file is readable
    ";
  56. }
  57. if(is_writable($fileName)){
  58. //Determine whether the file is writable
  59. echo "The file is writable
    ";
  60. }
  61. if(is_executable($fileName)){
  62. //Determine whether the file is executable
  63. echo "The file is executable";
  64. }
  65. echo "The creation time of the file is: ".date("Y-m-d H:i:s", filectime($fileName))."
    ";
  66. echo "The last update time of the file is: ".date("Y-m-d H:i:s", filemtime($fileName))."
    ";
  67. echo "The last time the file was opened is: ".date("Y-m-d H:i:s", fileatime($fileName))."
    ";
  68. }
  69. /*
  70. *Declare a function to get the file type by passing in a file name
  71. */
  72. function getFileType($fileName){
  73. switch(filetype($fileName)){
  74. case "file":
  75. $type = "Ordinary file" ;
  76. break;
  77. case "dir":
  78. $type = "Directory file";
  79. break;
  80. case "blokc":
  81. $type = "Block device file";
  82. break;
  83. case "char":
  84. $type = "Character device file";
  85. break;
  86. case "fifo":
  87. $type = "Named pipe file";
  88. break;
  89. case "link":
  90. $type = "Symbolic link";
  91. break;
  92. case " unkonwn":
  93. $type = "Unknown type";
  94. break;
  95. default:
  96. $type = "No type detected";
  97. }
  98. return $type;
  99. }
  100. /*
  101. *Declare a function to convert the file Size
  102. */
  103. function getFileSize($bytes){
  104. if($bytes >= pow(2,40)){
  105. //If the number of bytes provided is greater than or equal to 2 raised to the 40th power, the condition is true
  106. $ return = round($bytes/pow(1024,4),2);
  107. //Convert bytes to the equivalent size of T
  108. $suffix = "TB";
  109. }elseif($bytes >= pow(2 ,30)){
  110. $return = round($bytes/pow(1024,3),2);
  111. //Convert bytes to the equivalent size of G
  112. $suffix = "GB";
  113. }elseif($ bytes >= pow(2,20)){
  114. $return = round($bytes/pow(1024,2),2);
  115. //Convert bytes to the equivalent size of M
  116. $suffix = "MB ";
  117. }elseif($bytes >= pow(2,10)){
  118. $return = round($bytes/pow(1024,1),2);
  119. //Convert bytes to equivalent K Size
  120. $suffix = "KB";
  121. }else{
  122. $return = $bytes;
  123. //Convert bytes to the equivalent size of B
  124. $suffix = "B";
  125. }
  126. return $return." " .$suffix;
  127. }
  128. getFilePro("D:\lamp\php5\php.ini");
  129. $filepro=stat("D:/lamp/php5/php.ini");
  130. //Return the size of the file Some attributes
  131. print_r($filepro);
  132. ?>
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