PHP函数返回值可不可以既返回bool值,而且还返回其他值。该函数还可以判断真假
<code>function luhn_checker($card_num,$sum){ .... return ?; </code>
即可以返回bool值,又可以返回$sum这样的值,并且该函数需要判断真假
<code>if(luhn_checker($card_num)){ } </code>
回复内容:
<code>function luhn_checker($card_num,$sum){ .... return ?; </code>
即可以返回bool值,又可以返回$sum这样的值,并且该函数需要判断真假
<code>if(luhn_checker($card_num)){ } </code>
PHP里可以用数组和list保留字来返回多值,不过还是需要把判断单独一行……
function luhn_checker($card_num, $sum) { return array(true, $sum); } list($ret, $sum) = luhn_checker($card_num, $num); if($ret) ...
追加:提问评论里说的kv数组方式也可以用list解开成多个变量,解开的值的顺序与定义时的顺序相同
多种类型就最好使用===来判断。。。

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