PHP implementation of function overloading _php tutorial

Was php?name=php ">phpis not supported functionHeavy-duty!

PHP, as a weakly typed language, cannot itself be overloaded like a strong type, such as Java, C + +, as a direct implementation. However, it is possible to implement overloading indirectly by some means.

1. You can use the Func_get_args () and Func_num_args () functions to implement the functions of overloading!!

PHP Code:

  function   rewrite () {  $args  =  Func_get_arg               S   ();   if  ( func_num_args  () = = 1 ) {func1 (  $args  [0<               span>]);   Else   if  ( func_num_args  () = = 2 ) {Func2 (               span> $args  [0],  $args  [1 ]);  }}   function  func1 ( $arg  ) {  echo   $arg        ; }   function  func2 ( $arg 1 ,  $arg 2  ) { 
  
   echo  
    $arg 1 , ', 
    $arg 2  
   ; } rewrite ( ' PHP '); 
   // 
    call func1  rewrite (' PHP ', ' China '); 
   // 
    Call Func2  
  

2. Use the default values to get the results you want based on the input:

function Test ($name= "Xiao Li",$age= "All") {          echo$name.  $age ;          }        Test ();       Echo "
";      Test ("a");       Echo "
";      Test (

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