PHP Overloading similar to sprintf()?

Question

How do you write a function in PHP that can accept an unlimited number of arguments similar to sprintf?

sprintf("one:%s",$one);
sprintf("one:%s two:%s",$one,$two);
...

Answer 1

func_get_args()

Example from php.net

function foo()
{
    $numargs = func_num_args();
    echo "Number of arguments: $numargs<br />\n";
    if ($numargs >= 2) {
        echo "Second argument is: " . func_get_arg(1) . "<br />\n";
    }
    $arg_list = func_get_args();
    for ($i = 0; $i < $numargs; $i++) {
        echo "Argument $i is: " . $arg_list[$i] . "<br />\n";
    }
}

foo(1, 2, 3);

Answer 2

Easily. Declare your function with the static arguments

function myprintf ($string)

and get hold of the unlimited additional arguments using func_get_args() .

Answer 3

A function can accept as many parameters as you want ; it just has to deal with them using the following functions : func_num_args , func_get_arg , and func_get_args .

Examples are given on those three manual pages, but here's the one from the func_get_args page (quoting) :

function foo()
{
    $numargs = func_num_args();
    echo "Number of arguments: $numargs<br />\n";
    if ($numargs >= 2) {
        echo "Second argument is: " . func_get_arg(1) . "<br />\n";
    }
    $arg_list = func_get_args();
    for ($i = 0; $i < $numargs; $i++) {
        echo "Argument $i is: " . $arg_list[$i] . "<br />\n";
    }
}

foo(1, 2, 3);

And the output will be :

Number of arguments: 3<br />
Second argument is: 2<br />
Argument 0 is: 1<br />
Argument 1 is: 2<br />
Argument 2 is: 3<br />

Answer 4

使用func_get_args() 。