PHP에서 함수 및 생성자의 오버로드 예제를 구현하는 방법에 대한 자세한 설명

<?php
class A
{
   function call ( $name, $arguments )
    {
        echo "call调用<br/>";
        echo &#39;$name为&#39;.$name."<br/>";
        print_r ($arguments);
    }
}
(new A)->test("test","argument");
?>

<?php
class A
{
     function call ($name, $args )
    {
        if($name==&#39;f&#39;)
        {
            $i=count($args);
            if (method_exists($this,$f=&#39;f&#39;.$i)) {
                call_user_func_array(array($this,$f),$args);
            }
        }
    }
    function f1($a1)
    {
        echo "1个参数".$a1."<br/>";
    }
    function f2($a1,$a2)
    {
        echo "2个参数".$a1.",".$a2."<br/>";
    }
    function f3($a1,$a2,$a3)
    {
          echo "3个参数".$a1.",".$a2.",".$a3."<br/>";
    }
}
(new A)->f(&#39;a&#39;);
(new A)->f(&#39;a&#39;,&#39;b&#39;);
(new A)->f(&#39;a&#39;,&#39;b&#39;,&#39;c&#39;);
输出如下：
1个参数a   2个参数a,b    3个参数a,b,c

<?php
class A
{
    function construct()
    {
        echo "执行构造函数<br/>";
$a = func_get_args(); //获取构造函数中的参数
        $i = count($a);
        if (method_exists($this,$f=&#39;construct&#39;.$i)) {
call_user_func_array(array($this,$f),$a);
        }
    }
    function construct1($a1)
    {
        echo "1个参数".$a1."<br/>";
    }
    function construct2($a1,$a2)
    {
        echo "2个参数".$a1.",".$a2."<br/>";
    }
function construct3($a1,$a2,$a3)
    {
          echo "3个参数".$a1.",".$a2.",".$a3."<br/>";
    }
}
$o = new A(&#39;a&#39;);
$o = new A(&#39;a&#39;,&#39;b&#39;);
$o = new A(&#39;a&#39;,&#39;b&#39;,&#39;c&#39;);
?>