PHP function with any number of parameters

// function with 2 optional arguments
function foo($arg1 = '', $arg2 = '') {
 echo "arg1: $arg1n ";
 echo "arg2: $arg2n";
}
foo('hello','world');
/* prints:
arg1 : hello
arg2: world
*/
foo();
/* prints:
arg1:
arg2:
*/

How to create a function that accepts any number of arguments. You need to use the func_get_args() function:

// yes, the argument list can be empty
function foo() {
 // returns an array of all passed arguments
 $args = func_get_args();
 foreach ($args as $k => $v) {
 echo "arg".($k+1).": $vn";
 }< ;/p>
}
foo();
/* prints nothing */
foo('hello');
/ * prints
arg1: hello
*/
foo('hello', 'world', 'again');
/* prints
arg1: hello
arg2: world
arg3: again
*/