//变量的变量
$var = "this is a var";
$varname = "var";
echo $$varname;
//函数的变量
function fun1($str) {
echo $str;
}
$funname = "fun1";
$funname("This is a function !");
?>
变量的
"指针"。这个指针加上了双引号,表明他不是真正的指针。看看下例:
function($a) {
$a ++;
}
$c = 0;
function($c);
echo $c; //$c 仍为 0
function(&$a) {
$a ++;
}
$c = 0;
echo $c; //$c 为 1