Detailed explanation of binary cross permission micro PHP class_PHP tutorial

This article mainly introduces the binary cross permission micro php class, friends in need can refer to it

Highlights: 1. Many-to-many cross-scenario allocation; 2. New features of PHP - use of closures and batch processing functions array_walk/array_flip; 3. Bit operations & use cases; ​ Usage scenarios: 1. Common additions, deletions, modifications and searches (the Nth power value of 2 is stored in the database); 2. Authentication, third-party account binding, multi-category selection; ​ The code is as follows: 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 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 allowed values 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)); } } 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/730222.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/730222.htmlTechArticleThis article mainly introduces the binary cross permission micro php class. Friends who need it can refer to the following highlights: 1. Many-to-many cross-scenario allocation; 2. PHP new features - closure usage, batch processing functions...