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  1. <?php
  2.  
  3. $input = '2+2*2-2=';
  4. $inputLenght = strlen($input);
  5.  
  6. $number = 0;
  7. $result = 0;
  8. $op = '';
  9.  
  10. for($i = 0; $i < $inputLenght; $i++) {
  11. 	$char = substr($input, $i, 1);
  12. 		if($char == '*' || $char == '+' || $char == '-' ||$char == '=') {
  13. 		$op = $char;
  14. 		if($op == '*'){
  15. 			$result = $result * $number;
  16. 			}
  17. 				if($op == '+'){
  18. 			$result = $result + $number;
  19. 			}
  20.  
  21. 			if($op == '-'){
  22. 			$result = $result - $number;
  23. 			}
  24.  
  25. 			if($op == '='){
  26. 			echo $result;
  27. 			exit;
  28. 			}
  29. 		}
  30. 		elseif (is_numeric($char)) {
  31. 			$z = intval($char);
  32. 			$number = $number * 10;
  33. 			$number = $number + $z;
  34. 		}
  35. }
  36.  
Success #stdin #stdout 0.02s 23780KB
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Standard input is empty
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-178
https://ideone.com/Tjfbus
language:
PHP (php 7.3.5)
created:
6 years ago
visibility:
public

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