如何运用php函数mkdir创建多级目录
当我们想在自己的网站上添加多级目录时,可以使用php函数mkdir参数与描述
path 必需。规定要创建的目录的名称。
mode 必需。规定权限。默认是 0777。
recursive 必需。规定是否设置递归模式。
context 必需。规定文件句柄的环境。Context 是可修改流的行为的一套选项。
说明
php函数mkdir 尝试新建一个由 path 指定的目录。
默认的 mode 是 0777,意味着最大可能的访问权。
php默认的mkdir一次只能创建一层目录,如果在当前目录下创建一个div/css/layout 的目录就需要逐层逐层的先创建div,再创建div/css 再创建 div/css/layout,然而我们希望能让程序自动帮我们完成这个过程。
其实思路也很简单,1.先判断 div目录是否存在,不存在则创建;2.判断子目录 div/css 是否存在,不能存在则创建,3.在第二步中以子目录作为参数递归调用函数本身。也可以按相反顺序来,1.先判断最底层目录div/css/layout是否存在;2.判断div/css/layout的上层目录div/css是否存在,不存在则以div/css作为参数递归进行。。
下面是php函数mkdir的程序代码:
<ol class="dp-xml"> <li class="alt"><span><span>function mkdirs($dir) </span></span></li> <li><span>{ </span></li> <li class="alt"><span>if(!is_dir($dir)) </span></li> <li><span>{ </span></li> <li class="alt"><span>if(!mkdirs(dirname($dir))){ </span></li> <li><span>return false; </span></li> <li class="alt"><span>} </span></li> <li><span>if(!mkdir($dir,0777)){ </span></li> <li class="alt"><span>return false; </span></li> <li><span>} </span></li> <li class="alt"><span>} </span></li> <li><span>return true; </span></li> <li class="alt"><span>} </span></li> <li><span>mkdirs('div/css/layout'); </span></li> <li class="alt"><span>同样的思路,php用rmdir和unlink递归删除多级目录的代码: </span></li> <li><span>function rmdirs($dir) </span></li> <li class="alt"><span>{ </span></li> <li> <span>$</span><span class="attribute">d</span><span> = </span><span class="attribute-value">dir</span><span>($dir); </span> </li> <li class="alt"> <span>while (false !== ($</span><span class="attribute">child</span><span> = $d-</span><span class="tag">></span><span>read())){ </span> </li> <li><span>if($child != '.' && $child != '..'){ </span></li> <li class="alt"><span>if(is_dir($dir.'/'.$child)) </span></li> <li><span>rmdirs($dir.'/'.$child); </span></li> <li class="alt"><span>else unlink($dir.'/'.$child); </span></li> <li><span>} </span></li> <li class="alt"><span>} </span></li> <li> <span>$d-</span><span class="tag">></span><span>close(); </span> </li> <li class="alt"><span>rmdir($dir); </span></li> <li><span>} </span></li> </ol>
以上代码示例就是php函数mkdir实现创建多级目录的具体方法。

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