   #PHP Manual Function Handling functions func_get_args function_exists

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                                 func_num_args

   (PHP 4 )
   func_num_args --  Returns the number of arguments passed to the
   function

Description

   int func_num_args ( void )

   Returns the number of arguments passed into the current user-defined
   function. func_num_args() will generate a warning if called from
   outside of a user-defined function.

   <?php
   function foo() {
       $numargs = func_num_args();
       echo "Number of arguments: $numargs\n";
   }
   foo(1, 2, 3);    // Prints 'Number of arguments: 3'
   ?>

   func_num_args() may be used in conjunction with func_get_arg() and
   func_get_args() to allow user-defined functions to accept
   variable-length argument lists.
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