我有:
$directory='testdirectory/';
$handler = opendir($directory);
while ($file = readdir($handler)) {
...
}
这样排序的opendir / readdir的输出是什么?是日期,字母还是别的,因为我无法从输出中看出来。
答案 0 :(得分:4)
http://php.net/readdir说:“条目按文件系统存储的顺序返回。”
答案 1 :(得分:2)
如前所述,很难控制readdir()
列出文件的顺序。此函数可以帮助您 - 它获取目录的路径,在关联数组中创建它们的列表,并根据名称,大小或访问/修改/创建的时间对它们进行排序。希望它的用法应该是相当自我解释的。
// Constants to make usage more reader-friendly
define('DIR_SORT_NAME', 1);
define('DIR_SORT_SIZE', 2);
define('DIR_SORT_ATIME', 3);
define('DIR_SORT_MTIME', 4);
define('DIR_SORT_CTIME', 5);
function readdir_sorted_array ($dir, $sortCol = DIR_SORT_NAME, $sortDir = SORT_ASC) {
// Validate arguments
$dir = rtrim(str_replace('\\', '/', $dir), '/');
$sortCol = (int) ($sortCol >= 1 && $sortCol <= 5) ? $sortCol : 1;
$sortDir = ($sortDir == SORT_ASC) ? SORT_ASC : SORT_DESC;
$name = $size = $aTime = $mTime = $cTime = $table = array();
// Open the directory, return FALSE if we can't
if (!is_dir($dir) || (!$dp = opendir($dir))) return FALSE;
// Fetch a list of files in the directory and get stats
for ($i = 0; ($file = readdir($dp)) !== FALSE; $i++) {
if (!in_array($file, array('.','..'))) {
$path = "$dir/$file";
$row = array('name'=>$file,'size'=>filesize($path),'atime'=>fileatime($path),'mtime'=>filemtime($path),'ctime'=>filectime($path));
$name[$i] = $row['name'];
$size[$i] = $row['size'];
$aTime[$i] = $row['atime'];
$mTime[$i] = $row['mtime'];
$cTime[$i] = $row['ctime'];
$table[$i] = $row;
}
}
// Sort the results
switch ($sortCol) {
case DIR_SORT_NAME:
array_multisort($name, $sortDir, $table);
break;
case DIR_SORT_SIZE:
array_multisort($size, $sortDir, $name, SORT_ASC, $table);
break;
case DIR_SORT_ATIME:
array_multisort($aTime, $sortDir, $name, SORT_ASC, $table);
break;
case DIR_SORT_MTIME:
array_multisort($mTime, $sortDir, $name, SORT_ASC, $table);
break;
case DIR_SORT_CTIME:
array_multisort($cTime, $sortDir, $name, SORT_ASC, $table);
break;
}
// Return the result
return $table;
}