3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php class ExpressionCalculator { private $operators = array(); public function __construct() { $operators['+'] = function ($leftOperand, $rightOperand) { return $leftOperand + $rightOperand; }; $operators['-'] = function ($leftOperand, $rightOperand) { return $leftOperand - $rightOperand; }; $operators['*'] = function ($leftOperand, $rightOperand) { return $leftOperand * $rightOperand; }; $operators['/'] = function ($leftOperand, $rightOperand) { return $leftOperand / $rightOperand; }; } public function calc($expression) { $operands = array(); while (($token = strtok($expression, ' ')) !== false) { if ($this->isOperator($token)) { $rightOperand = array_pop($operands); $leftOperand = array_pop($operands); $result = $this->execute($token, $leftOperand, $rightOperand); array_push($operands, $result); } else if (is_numeric($token)) { array_push($operands, $token); } else { throw new InvalidArgumentException('Expression has invalid token: ' + $token); } } return $result; } private function isOperator($token) { return isset($operators[$token]); } private function execute($operator, $leftOperand, $rightOperand) { return call_user_func($operators[$operator], $leftOperand, $rightOperand); } } $calc = new ExpressionCalculator(); echo $calc->calc('5 1 2 + 4 * + 3 -'); // 14
Output for 7.0.0 - 7.1.0
Fatal error: Allowed memory size of 67108864 bytes exhausted (tried to allocate 33554440 bytes) in /in/cAHiS on line 31
Process exited with code 255.
Output for hhvm-3.12.0
mallctl opt.prof: No such file or directory (2) Fatal error: request has exceeded memory limit in /in/cAHiS on line 24
Process exited with code 255.
Output for hhvm-3.10.0
Fatal error: request has exceeded memory limit in /in/cAHiS on line 24
Process exited with code 255.
Output for 5.4.0 - 5.4.9, 5.6.0 - 5.6.28
Fatal error: Allowed memory size of 67108864 bytes exhausted (tried to allocate 72 bytes) in /in/cAHiS on line 31
Process exited with code 255.
Output for 5.4.10 - 5.5.38
Fatal error: Allowed memory size of 67108864 bytes exhausted (tried to allocate 32 bytes) in /in/cAHiS on line 24
Process exited with code 255.
Output for 5.3.0 - 5.3.29
Fatal error: Allowed memory size of 67108864 bytes exhausted (tried to allocate 71 bytes) in /in/cAHiS on line 31
Process exited with code 255.
Output for 5.1.0 - 5.2.17
Parse error: syntax error, unexpected T_FUNCTION in /in/cAHiS on line 7
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_FUNCTION in /in/cAHiS on line 7
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/cAHiS on line 4
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1
Parse error: parse error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/cAHiS on line 4
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `T_OLD_FUNCTION' or `T_FUNCTION' or `T_VAR' or `'}'' in /in/cAHiS on line 4
Process exited with code 255.