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Homephp教程php手册使用PHP维护文件系统

PHP有很多与文件系统相关的函数,不仅可以帮助你打开文件,还可以显示目录内容、移动文件等。很多人甚至使用PHP写出了基于Web的文件管理器。





首先需要提醒一些关于文件路径的东西:在Windows你可以在文件路径中使用斜线“/”或反斜线“\”,而其他操作系统仅使用”/”。出于兼容性考虑,以下实例使用“/”的表示方法:

下面的简单脚本显示了一个基本的目录列表。注释在代码中并解释了每一步:

/* 在变量 $dir_name中给出希望访问的目录完整路径*/

$dir_name = "/home/me/";

/* 创建句柄,打开给定目录的结果*/

$dir = opendir($dir_name);

/* 启动一段文本添加到将要放置列表元素(文件名)的地方 */

$file_list = "

    ";

    /* 使用while语句,读取所打开目录的所有元素。如果文件名既非“.”及“..”则在列表中输出文件名*/

    while ($file_name = readdir($dir)) {

    if (($file_name != ".") && ($file_name != "..")) {

    $file_list .= "
  • $file_name";

    }

    }

    /* 终结列表 */

    $file_list .= "
";





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