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  1. <?php
  2. $number = 0;
  3. $result = 0;
  4. $op = '';
  5.  
  6. $input = "53+6*2=";
  7. $inputLength = strlen($input);
  8.  
  9. for ($i=0;$i<$inputLength;$i++){
  10.  
  11. 	$char = substr($input,$i,1);
  12. 	if ($char == "*"||$char== "="||$char== "-"||$char== "+"){
  13.  
  14. 		if ($op == "+"){
  15. 			$result+=$number;
  16. 		}
  17. 		elseif($op == "*"){
  18. 			$result*=$number;
  19. 					}
  20. 		elseif($op == "-"){
  21. 			$result-=$number;
  22. 		}
  23. 		elseif ($op == "="){
  24.  
  25. 		}
  26. 		else{
  27. 			$result= $number;
  28. 					}
  29.  
  30. 			echo "op[$op] result[$result] number[$number] char[$char] \n";
  31. 			$number = 0;
  32. 			$op = $char;
  33.  
  34. 	}
  35. 	elseif (is_numeric($char)){
  36. 		$number=$number*10+$char;
  37. 	}
  38.  
  39. }
  40.  
Success #stdin #stdout 0.01s 82880KB
comments (?)
stdin
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Standard input is empty
stdout
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op[] result[53] number[53] char[+] 
op[+] result[59] number[6] char[*] 
op[*] result[118] number[2] char[=]
https://ideone.com/9fc5tF
language:
PHP (php 7.3.5)
created:
6 years ago
visibility:
public

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