Play PHP recursive function: PHP recursive function return value problem ultimate Solution

In the PHP recursive function, often encountered recursive function no return value of the problem, then in the PHP implementation of recursion to correctly handle the return value, PHP recursive function no return value to do, you can refer to the example of this article analysis. First, the return value of the PHP recursive function Example 1: Copy Code code example: function test ($i) {$i-=4; if ($i <3) {return $i;} else{ Test ($i); }} echo Test (30). " "; Note that the else inside of the code above is problematic, and return$i all functions will not return a value when the condition $i<3. Example 2, modify the PHP recursive function to: Copy Code code example: function test ($i) {$i-=4; if ($i <3) {return $i;} else{ Return test ($i); }} echo Test (30). " "; Second, PHP recursive function return value problem

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