Binary Cross Permission Mini PHP Class Sharing_PHP Tutorial

Highlights:
1. Many-to-many cross-scenario allocation;
2. PHP new features - use of closures, use of batch functions array_walk/array_flip;
3. Bit operations & use cases;

Usage scenarios:
1. Common additions, deletions and modifications (2 to the Nth power value is stored in the database);
2. Authentication, third-party account binding, multi-category selection;

Copy code The code is as follows:

class s_allow{

//Declare usage scenarios, task list
public $scene,$case_list=array();

//Declare the specified user role, allowed value, and allowed list
public $allow_value=0,$allow_list=array();

//Initialize scene and role
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);
}
}

//Get all task lists
function case_list($mode=false){
$case_list=config($this->scene,'allow');
return $mode ? $case_list : array_keys($case_list);
}

//Get the user task list
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);
}

//Calculate the allowed value
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);
}

//Determine whether it is allowed
function is_allow($case){
$case_list=array_flip($this->case_list);
return (bool)($this-> allow_value & pow(2,$case_list[$case]-1));
}
}

Copy code The code is as follows:

[access]
1=add
2=del
3=read
4=list
5=mod
6=detail
7=pub
8=collect
9=like
10=send

[cert]
1=email
2=tel
3=qq
4=identity_card
5=real_name
6=business_license

[bind]
1=qq
2=weibo
3=taobao
4=alipay
5=renren
6=weichat
7= baidu

http://www.bkjia.com/PHPjc/730061.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/730061.htmlTechArticleHighlights: 1. Many-to-many cross-scenario allocation; 2. PHP new features - closure usage, batch processing Function array_walk/array_flip is used; 3. Bit operations