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php高效遍历目录文件及子目录

PHPz
Release: 2018-10-08 15:08:33
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如果目录很多,推荐队列方式,递归方式会慢,慢的原因:递归的实现是通过调用函数本身,函数调用的时候,每次调用时要做地址保存,参数传递等

<?php
//递归方式
function read_dir($dir){
	$files=array();
	$dir_list=scandir($dir);
	foreach($dir_list as $file){
		if($file!='..' && $file!='.'){
			if(is_dir($dir.'/'.$file)){
				$files[]=read_dir($dir.'/'.$file);
			}else{
				$files[]=$file;
			}
		}
	}
	return $files;
}
//队列方式 
function read_dir_queue($dir){
	$files=array();
	$queue=array($dir);
	while($data=each($queue)){
		$path=$data['value'];
		if(is_dir($path) && $handle=opendir($path)){
			while($file=readdir($handle)){
				if($file=='.'||$file=='..') continue;
				$files[] = $real_path=$path.'/'.$file;
				if (is_dir($real_path)) $queue[] = $real_path;
			}
		}
		closedir($handle);
	}
	 return $files;
}
print_r(read_dir_queue('D:/webroot/suanfa/dir'));exit;
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