PHP字符串的数学运算

$mathString = 'goods_price - cost_price';$array = ['goods_price' => 1000, 'cost_price' => 500]; // 解析数学运算字符串 $pattern = '/([a-zA-Z_]+)/'; // 匹配字母和下划线 preg_match_all($pattern, $mathString,$matches); $variables =$matches[0]; // 获取对应的值 $values = []; foreach ($variables as variable) { if (isset(array[variable])) { values[] = $array[$variable]; } } // 执行数学运算 $result = eval("return " . str_replace($variables, $values,$mathString) . ";"); dd($result)