非常に紛らわしい PHP 面接の質問
$a = 1; $b = 'a'; $a = $b++; //$a = 'a' //$b = 'b' $b = $a++; //$b = 'a' //$a = 'b' $c = set($a).$b; //$c = 3.'a' //$c = 3a echo $c; function set($a=2,$b=3){ global $a; //$a = 'b' $c = &$a; $a += $b++; //$a = 'b' + 3 //$a = 3 //$c = 3 return $c; }