Serigne

<?php function evaluate($expression){ // TODO : add rendering code here switch ($expression['type']) { case 'number': $result = $expression['value']; break; case 'add': $result = 0; foreach ($expression['children'] as $child) { $result += evaluate($child); } break; case 'multiply': $result = 1; foreach ($expression['children'] as $child) { $result *= evaluate($child); } break; case 'fraction': $result = evaluate($expression['top']) / evaluate($expression['bottom']); break; } return $result; } // 100 + 200 + 300 $expression1 = [ "type" => "add", 'children'=> [ [ "type" => "number", "value"=>100 ], [ "type" => "number", "value"=> 200 ], [ "type" => "number", "value"=> 300 ] ] ]; $expression2 = [ "type" => "add", 'children'=> [ [ "type" => "number", "value"=>100 ], [ "type" => "multiply", "children" =>[ [ "type" => "number", "value"=>2 ], [ "type" => "add", "children" =>[ [ "type" => "number", "value"=>5 ], [ "type" => "number", "value"=>45 ] ] ] ] ] ] ]; $expression3 = [ "type" => "add", 'children'=> [ [ "type" => "number", "value"=>1 ], [ "type" => "fraction", "top"=> [ "type" => "number", "value"=>100 ], "bottom"=> [ "type" => "number", "value"=>1000 ] ] ] ]; echo "Expression 1 evaluates to: " . evaluate($expression1) . " </br>"; echo "Expression 2 evaluates to: " . evaluate($expression2) . " <br>"; echo "Expression 3 evaluates to: " . evaluate($expression3) . " <br>"; Thank to all for your intervention and special thank to @Barand who help me for solution: here the code for someone interesting

😔I'm ashamed to say that I can't

Thank's for your answer so for doing the same for add i use: $result = $exp['value']+$exp['value'] or i use $exp['children']['value']? I'm trying to resolve this function i just wont to improve my PHP. Just give me a incation for add please

The exrcise is here: Implement the 'evaluate()' function in the following program to calculate the result of arbitrary expressions, such as the ones provided in file exercice-1.php. Output will look like this : <?php function evaluate($expression){ // TODO : add rendering code here } // 100 + 200 + 300 $expression1 = [ "type" => "add", 'children'=> [ [ "type" => "number", "value"=>100 ], [ "type" => "number", "value"=> 200 ], [ "type" => "number", "value"=> 300 ] ] ]; $expression2 = [ "type" => "add", 'children'=> [ [ "type" => "number", "value"=>100 ], [ "type" => "multiply", "children" =>[ [ "type" => "number", "value"=>2 ], [ "type" => "add", "children" =>[ [ "type" => "number", "value"=>5 ], [ "type" => "number", "value"=>45 ] ] ] ] ] ] ]; $expression3 = [ "type" => "add", 'children'=> [ [ "type" => "number", "value"=>1 ], [ "type" => "fraction", "top"=> [ "type" => "number", "value"=>100 ], "bottom"=> [ "type" => "number", "value"=>1000 ] ] ] ]; echo "Expression 1 evaluates to: " . evaluate($expression1) . " <br>"; echo "Expression 2 evaluates to: " . evaluate($expression2) . " <br>"; echo "Expression 3 evaluates to: " . evaluate($expression3) . " <br>";

I think the problem is the return I don't know if i change it by ECHO or not

Thank you for your answer, what do you suggest as a solution?

Hello I have a little problem with this exercise I managed to access the elements of the arrays but I can't display the results for: echo "Expression 1 evaluates to: " . evaluate($expression1) . " <br>"; echo "Expression 2 evaluates to: " . evaluate($expression2) . " <br>"; echo "Expression 3 evaluates to: " . evaluate($expression3) . " <br>"; Need help please <?php function evaluate($expression){ // TODO : add rendering code here $test0 = $expression['children'][0]['value']; $test1 = $expression['children'][1]['value']; $test2 = $expression['children'][2]['value']; return $test0+$test1+$test2; $exp = $expression['children'][0]['value']; $exp1 = $expression['children'][1]['children'][0]['value']; $exp2 = $expression['children'][1]['children'][1]['children'][0]['value']; $exp3 = $expression['children'][1]['children'][1]['children'][1]['value']; return ($exp+$exp1 * ($exp2 + $exp3)); $resp = $expression['children'][0]['value']; $resp1 = $expression['children'][1]['top']['value']; $resp2 = $expression['children'][1]['bottom']['value']; return $resp + $resp1 / $resp2; } // 100 + 200 + 300 $expression1 = [ "type" => "add", 'children'=> [ [ "type" => "number", "value"=>100 ], [ "type" => "number", "value"=> 200 ], [ "type" => "number", "value"=> 300 ] ] ]; $expression2 = [ "type" => "add", 'children'=> [ [ "type" => "number", "value"=>100 ], [ "type" => "multiply", "children" =>[ [ "type" => "number", "value"=>2 ], [ "type" => "add", "children" =>[ [ "type" => "number", "value"=>5 ], [ "type" => "number", "value"=>45 ] ] ] ] ] ] ]; $expression3 = [ "type" => "add", 'children'=> [ [ "type" => "number", "value"=>1 ], [ "type" => "fraction", "top"=> [ "type" => "number", "value"=>100 ], "bottom"=> [ "type" => "number", "value"=>1000 ] ] ] ]; echo "Expression 1 evaluates to: " . evaluate($expression1) . " <br>"; echo "Expression 2 evaluates to: " . evaluate($expression2) . " <br>"; echo "Expression 3 evaluates to: " . evaluate($expression3) . " <br>";