function fun(&$arg){
$return=$arg;
$arg+=1;
return $return;
}
$a=3;
var_dump(fun($a)-$a);
php7:运行结果 -1
求解为什么
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function fun(&$arg){
$return=$arg;
$arg+=1;
return $return;
}
$a=3;
var_dump(fun($a)-$a);
php7:运行结果 -1
求解为什么
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