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php echo 与 return 区别

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2016-06-08 17:29:171015browse
<script>ec(2);</script>

function values($price,$tax=0.45){
$price=$price+($price*$tax);
    echo  $price;
}
echo values(100);
?>


function values($price,$tax=0.45){
$price=$price+($price*$tax);
    return  $price;
}
echo values(100);
?>

这两段代码输出结果都一样


相关解答:

echo用于输出打印,而函数里的return是得到一个返回值
如果只是要实现打印的话,可以使用echo,但如果是要得到这个函数的返回值并在以后的程序中用到的话必须命使用return得到返回值

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