PHP常用的基本文件和目錄操作總結
一、基本文件的操作
文件的基本操作有：文件判斷、目錄判斷、文件大小、讀寫性判斷、存在性判斷及文件時間等
1: <?php
2: header("content-type","text/html;charset=utf-8");
3: /*
4: *聲明一個函數，傳入文件名獲取文件屬性
5: *@param string $fileName 文件名稱
6: */
7: function getFilePro($fileName)
8: {
9: if(!file_exists($fileName))
10: {
11: echo '文件不存在<br/>';
12: return;
13: }
14: /*是否是普通文件*/
15: if(is_file($fileName))
16: {
17: echo $fileName.'是一個文件<br/>';
18: }
19: /*是否是目錄*/
20: if(is_dir($fileName))
21: {
22: echo $fileName.'是一個目錄';
23: }
24: /*輸出文件的型態*/
25: echo '文件型態是：'.getFileType($fileName).'<br/>';
26: /*文件大小,轉換單位*/
27: echo '文件大小是：'.getFileSize(filesize($fileName)).'<br/>';
28: /*文件是否可讀*/
29: if(is_readable($fileName))
30: {
31: echo '文件可讀<br/>';
32: }
33: /*文件是否可寫*/
34: if(is_writable($fileName))
35: {
36: echo '文件可寫<br/>';
37: }
38: /*文件是否可執行*/
39: if(is_executable($fileName))
40: {
41: echo '文件可執行<br/>';
42: }
43:
44: echo '文件創立時間：'.date('Y年m月j日',filectime($fileName)).'<br/>';
45: echo '文件***修改時間：'.date('Y年m月j日',filemtime($fileName)).'<br/>';
46: echo '文件***打開時間：'.date('Y年m月j日',fileatime($fileName)).'<br/>';
47: }
48:
49: /*
50: *聲明一個函數，返回文件類型
51: *@param string $fileName 文件名稱
52: */
53: function getFileType($fileName)
54: {
55: $type = '';
56: switch(filetype($fileName))
57: {
58: case 'file':$type .= '普通文件';break;
59: case 'dir':$type .= '目錄文件';break;
60: case 'block':$type .= '塊設備文件';break;
61: case 'char':$type .= '字符設備文件';break;
62: case 'filo':$type .= '管道文件';break;
63: case 'link':$type .= '符號鏈接';break;
64: case 'unknown':$type .= '未知文件';break;
65: default:
66: }
67: return $type;
68: }
69:
70: /*
71: *聲明一個函數，返回文件大小
72: *@param int $bytes 文件字節數
73: */
74: function getFileSize($bytes)
75: {
76: if($bytes >= pow(2,40))
77: {
78: $return = round($bytes / pow(1024,4),2);
79: $suffix = 'TB';
80: }
81: else if($bytes >= pow(2,30))
82: {
83: $return = round($bytes / pow(1024,3),2);
84: $suffix = 'GB';
85: }
86: else if($bytes >= pow(2,20))
87: {
88: $return = round($bytes / pow(1024,2),2);
89: $suffix = 'MB';
90: }
91: else if($bytes >= pow(2,10))
92: {
93: $return = round($bytes / pow(1024,1),2);
94: $suffix = 'KB';
95: }
96: else
97: {
98: $return = $bytes;
99: $suffix = 'B';
100: }
101: return $return." ".$suffix;
102: }
103:
104: /*調用函數，傳入test目錄下的test.txt文件*/
105: getFilePro('./test/div.html');
106: ?>
結果:
二、目錄的操作
目錄的操作有：遍歷目錄、刪除、復制、大小統計等
1、遍歷目錄
1: /*
2: *遍歷目錄
3: *@param string $dirName 目錄名
4: */
5: function findDir($dirName)
6: {
7: $num = 0; /*統計子文件個數*/
8: $dir_handle = opendir($dirName); /*打開目錄*/
9: /*輸出目錄文件*/
10: echo '<table border="0" align="center" width="600" cellspacing="0" cellpadding="0">';
11: echo '<caption><h2>目錄'.$dirName.'下的文件</h2></caption>';
12: echo '<tr align="left" bgcolor="#cccccc"';
13: echo '<th>文件名</th><th>文件大小</th><th>文件類型</th><th>修改時間</th></tr>';
14:
15: while($file = readdir($dir_handle))
16: {
17: $dirFile = $dirName.'/'.$file;
18: $bgcolor = $num++%2==0?'#ffffff':'#cccccc';
19: echo '<tr bgcolor='.$bgcolor.'>';
20: echo '<td>'.$file.'</td>';
21: echo '<td>'.filesize($dirFile).'</td>';
22: echo '<td>'.filetype($dirFile).'</td>';
23: echo '<td>'.date('Y/n/t',filemtime($dirFile)).'</td>';
24: echo '</tr>';
25: }
26: echo "</table>";
27: closedir($dir_handle); /*關閉目錄*/
28: echo "在<b>".$dirName."</b>目錄下共有<b>".$num.'</b>個子文件';
29: }
30: /*傳遞當前目錄下的test目錄*/
31: findDir('./test');
結果
2、統計目錄大小
1: /*
2: *統計目錄大小
3: *@param string $dirName 目錄名
4: *@return double
5: */
6:
7: function dirSize($dirName)
8: {
9: $dir_size = 0;
10: if($dir_handle = @opendir($dirName))
11: {
12: while ($fileName = readdir($dir_handle))
13: {
14: /*排除兩個特殊目錄*/
15: if($fileName != '.' && $fileName != '..')
16: {
17: $subFile = $dirName.'/'.$fileName;
18: if(is_file($subFile))
19: {
20: $dir_size += filesize($subFile);
21: }
22: if(is_dir($subFile))
23: {
24: $dir_size += dirSize($subFile);
25: }
26: }
27: }
28: closedir($dir_handle);
29: return $dir_size;
30: }
31: }
32: /*傳遞當前目錄下的test目錄*/
33: $dir_size = dirSize('./test');
34: echo './test目錄文件大小是：'.round($dir_size / pow(1024,1),2).'KB';
結果
3、刪除目錄
1: /*
2: *刪除目錄
3: *@param string $dirName 目錄名
4: */
5: function delDir($dirName)
6: {
7: /*php中的mkdir函數就可以創建目錄*/
8: if(file_exists($dirName))
9: {
10: if($dir_handle = @opendir($dirName))
11: {
12: while ($fileName = readdir($dir_handle))
13: {
14: /*排除兩個特殊目錄*/
15: if($fileName != '.' && $fileName != '..')
16: {
17: $subFile = $dirName.'/'.$fileName;
18: if(is_file($subFile))
19: {
20: unlink($subFile);
21: }
22: if(is_dir($subFile))
23: {
24: delDir($subFile);
25: }
26: }
27: }
28: closedir($dir_handle);
29: rmdir($dirName);
30: return $dirName.'目錄已經刪除';
31: }
32: }
33: }
34: /*傳遞test目錄的副本test1*/
35: echo delDir('./test1');
刪除成功的提示信息
4、復制目錄
1: /*
2: *復制目錄
3: *@param string $dirSrc 原目錄名
4: *@param string $dirTo 目標目錄名
5: */
6: function copyDir($dirSrc,$dirTo)
7: {
8: if(is_file($dirTo))
9: {
10: echo '目標目錄不能創建';/*目標不是一個*/
11: return;
12: }
13: if(!file_exists($dirTo))
14: {
15: /*目錄不存在則創建*/
16: mkdir($dirTo);
17: }
18: if($dir_handle = @opendir($dirSrc))
19: {
20: while ($fileName = readdir($dir_handle))
21: {
22: /*排除兩個特殊目錄*/
23: if($fileName != '.' && $fileName != '..')
24: {
25: $subSrcFile = $dirSrc.'/'.$fileName;
26: $subToFile = $dirTo.'/'.$fileName;
27: if(is_file($subSrcFile))
28: {
29: copy($subSrcFile,$subToFile);
30: }
31: if(is_dir($subSrcFile))
32: {
33: copyDir($subSrcFile,$subToFile);
34: }
35: }
36: }
37: closedir($dir_handle);
38: return $dirSrc.'目錄已經復制到'.$dirTo.'目錄';
39: }
40: }
41: echo copyDir('./test','../testcopy');
