数组测试:

“+”=> {$userArray['age']+1}

“-”=> {$userArray['age']-1}

“*”=> {$userArray['age']*2}

“/”=> {$userArray['age']/2}

“%”=> {$userArray['age']%2}

对象测试:

“+”=> {$userObj->age+1}

“-”=> {$userObj->age-1}

“*”=> {$userObj->age*2}

“/”=> {$userObj->age/2}

“%”=> {$userObj->age%2}