Расчет по формуле php
function calculated_formula($elements_formula=array(), $formula='',$default=0){ if(count($elements_formula)>0 && strlen($formula)>0){ $pattern = "/\[([A-Za-z_0-9]*?)\]/i"; preg_match_all($pattern, $formula, $matches); foreach($matches[1] as $elemFormula){ if(!isset($elements_formula[$elemFormula]) || empty($elements_formula[$elemFormula])){ $elements_formula[$elemFormula] = $default; } } $replacement = "\$elements_formula$0"; $result = preg_replace($pattern, $replacement, $formula); return eval("return $result;"); } } $test['test1'] = ''; $test['test2'] = 3; echo calculated_formula($test, '[test1]+[test2]+1',1);