在PHP中的数组元素之间应用逻辑运算符

Question

I have a three array , one is the boolean array which contains all boolean values, second is the conditional array which contains and/or operations between the array of boolean and the third one is the route page array which if the expression is true then it is redirect to next route page else not eg array

array(2) { [0]=> bool(true) [1]=> bool(false) ...} // boolean array
array(2) { [0]=> string(2) "or" [1]=> string(0) "" ...} // conditional operator array
array(2) { [0]=> string(1) "2" [1]=> string(1) "2" ... } // route page 

the expression would be made (bool(true) or bool(false)) hence the result would be bool(true) final and hence it would redirect to page two ie What I need the recursive expression in loop

Here is the code what I applied

 for($i=0;$i<count($boolean);$i++)
           {
               if($and_or[$i]=='and')
               {
                   $operator='&&';
               }
               else
               {
                   $operator='||';
               }
               $result=($boolean[$i].$operator.$boolean[$i+1]);

           }
           var_dump($result);

Answer 1

As I didn't like the complexity of the suggested answers I dug deeper and ended up scanning the array functions listed in http://php.net/manual/en/ref.array.php .

These might not be the best performance-wise, but are simple and I wouldn't consider the performance penalty if you're not applying on a large array.

For logical AND ( && ) use this:

var_export(!in_array(false,array(true,true,false,false,true,false))); //false

or this:

var_export((bool)array_product(array(true,true,false,false,true,false))); //false

For logical OR ( || ) use this:

var_export(in_array(true,array(true,true,false,false,true,false))); //true

or this:

var_export(array_search(true,array(true,true,false,false,true,false))!==false); //true

I am taking a wild guess the in_array 's would be faster. But with PHP 7 out who knows...

Answer 2

Maybe this brings you closer to your goal:

 for($i=0;$i<count($boolean)-1;$i++)
 {
   if ($i < count($and_or) && !empty($and_or[$i]) {
     if($and_or[$i]=='and')
     {
           $operator='&&';
           $result = $boolean[$i] && $boolean[$i+1];
     }
     else
     {
          $operator='||';
          $result = $boolean[$i] || $boolean[$i+1];
     }
     $operation=($boolean[$i].$operator.$boolean[$i+1]);
 }
 var_dump($operation);
 var_dump($result);

Please note that you use most boolean values two times (the second value is the second operator for the first operation and the first operator for the second operation).

Answer 3

Try below code:

for( $i = 0; $i < count( $boolean ); $i++ ) {
    switch( $and_or[ $i ] ) {
        case '&&':
        case 'and':
            $result = $boolean[ $i ] && $boolean[ $i + 1 ];
            break;
        case '||':
        case 'or':
            $result = $boolean[ $i ] || $boolean[ $i + 1 ];
            break;
    }
    var_dump( $result );
}

You can also use and , or operators. If you have more than two operators, you can use eval function like this:

$boolean = [1,0,0];
$o = ['&&','or'];
echo $r = "return ($boolean[0] $o[0] $boolean[1]) $o[1] $boolean[2];";
var_dump( eval($r) );