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二进制交叉权限微型php类

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Release: 2016-05-25 17:00:03
Original
1211 people have browsed it

靓点:
1、多对多交叉场景分配;
2、php新特性-闭包使用、批处理函数array_walk/array_flip使用;
3、位运算&使用案例;

使用场景:
1、常见增删改查(2的N次方值入库);
2、认证、第三方账号绑定、多分类选择;

<?php

class s_allow{

//声明使用场景,任务清单
public $scene,$case_list=array();

//声明指定用户角色、允许值、允许清单
public $allow_value=0,$allow_list=array();


//初始化场景、角色
function __construct($scene,$allow_value=0){
$this->scene=$scene;
$this->case_list=$this->case_list(true);

if ($allow_value) {
$this->allow_value=$allow_value;
$this->allow_list=$this->allow_list($allow_value,true);
}
}


//取得全部任务清单
function case_list($mode=false){
$case_list=config($this->scene,&#39;allow&#39;);
return $mode ? $case_list : array_keys($case_list);
}


//取得用户任务清单
function allow_list($allow_value=0,$mode=false){
$buffer=array();
foreach ($this->case_list as $key=>$value) {
if ($allow_value & pow(2,$key-1)) {
$buffer[$key]=$value;
}
}
return $mode ? $buffer : array_keys($buffer);
}


//计算允许值
function allow_value($allow_list=null){
if ($allow_list==null) $allow_list=$this->allow_list;
array_walk($allow_list, function($value,$key) use(&$allow_list){
$allow_list[$key]=pow(2,$value-1);
});
return array_sum($allow_list);
}


//判断是否允许
function is_allow($case){
$case_list=array_flip($this->case_list);
return (bool)($this->allow_value & pow(2,$case_list[$case]-1));
}


}
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