Home php教程 php手册 PHP用迭代方法和递归方法创建级联目录(学习用,开发中应该写mkdir('./a/b/c/d/e',0777,true)

PHP用迭代方法和递归方法创建级联目录(学习用,开发中应该写mkdir('./a/b/c/d/e',0777,true)

Jun 13, 2016 am 10:56 AM
mkdir php true Write create and study develop method use Table of contents cascade Iterate recursion

[php] 

/* 

用迭代的方法递归创建目录 

其实在PHP5.0.0之后mkdir就已经能递归创建目录了。 

这里主要是自己学习迭代,所以拿创建级联目录开刀了。 

开发中应该写mkdir('./a/b/c/d/e',0777,true); 

官方说明: 

在 PHP 中可以调用递归函数。 

但是要避免递归函数/方法调用超过 100-200 层, 

因为可能会使堆栈崩溃从而使当前脚本终止。 

*/  

function it_mk_dir($path){  

    //定义一个数组,用来存放需要工作创建目录的任务  

    $arr = array();  

    //如果要创建的目录不存在,则表示有任务追加  

    while(!is_dir($path)){  

        array_unshift($arr,$path);  

        //将任务追加后取父目录  

        $path = dirname($path);  

    }  

    //如果没有任务(即:需要创建的目录已经存在)  

    if(empty($arr)){  

        return true;  

    }  

    //否则开始执行任务  

    foreach($arr as $k => $v){  

        //由上面的array_unshift压入方式,可直接这样调用  

        mkdir($v) ? print('创建'.$v.'目录成功!
'):print('创建失败->'.$v.'
');  

    }  

    return true;  

}  

[php]  

/* 

递归方法创建 

*/  

function mk_dir($path){  

    if(is_dir($path)){  

        return true;  

    }  

    //父目录存在或者是需要创建才能调用mkdir  

    return is_dir(dirname($path)) || mk_dir(dirname($path)) ? mkdir($path) : false;  

}  

it_mk_dir('./a/b/c/d/e/f/g');  

 

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