PHP小技巧之函数重载

function rewrite() {
$args = func_get_args();
if(func_num_args() == 1) {
func1($args[0]);
} else if(func_num_args() == 2) {
func2($args[0],$args[1]);
}
}
function func1($arg) {
echo $arg;
}
function func2($arg1,$arg2) {
echo $arg1,' ',$arg2;
}
rewrite('PHP'); //调用func1
rewrite('PHP','China'); //调用func2

function test($name="小李",$age="23"){
echo $name." ".$age;
} test();
echo "
";
test("a");
echo "
";
test("a","b");