Func_get_args () func_get_arg (offset) func_num_args (); function usage _ PHP Tutorial

Func_get_args () func_get_arg (offset) func_num_args (); used by the function. Func_get_args is the array of parameters in the method, and an array is returned, used together with func_num_args; func_get_arg is the func_num_args parameter for obtaining the specified offset. the statistical parameter func_get_args is the array of parameters in the method, the returned result is an array used with func_num_args;

Func_get_arg is a parameter used to obtain the specified offset.

Func_num_args count

Func_num_args is generally written in the method for counting;
The usage is as follows:
[Php]
Function myargs ($ a = 'para1', $ B = 'para2 '){
$ Numargs = func_num_args ();
Echo "Number of parameters: $ numargs
\ N ";
If ($ numargs> = 2 ){
Echo "Second parameters is:". func_get_arg (1 )."
\ N ";
}
$ Arg_list = func_get_args ();
For ($ I = 0; $ I <$ numargs; $ I ++ ){
Echo "parameters $ I is:". $ arg_list [$ I]."
\ N ";
}
}

Myargs (11, 22 );
The output is as follows:
Number of parameters: 2
Second parameters is: 22
Parameters 0 is: 11
Parameters 1 is: 22

Function myargs ($ a = 'para1', $ B = 'para2 '){
$ Numargs = func_num_args ();
Echo "Number of parameters: $ numargs
\ N ";
If ($ numargs> = 2 ){
Echo "Second parameters is:". func_get_arg (1 )."
\ N ";
}
$ Arg_list = func_get_args ();
For ($ I = 0; $ I <$ numargs; $ I ++ ){
Echo "parameters $ I is:". $ arg_list [$ I]."
\ N ";
}
}

Myargs (11, 22 );
The output is as follows:
Number of parameters: 2
Second parameters is: 22
Parameters 0 is: 11
Parameters 1 is: 22

The specified func_get_arg parameter is used to obtain the statistical parameters of the specified offset...