Can a PHP Function Accept an Unlimited Number of Parameters

Can a PHP function accept an unlimited number of parameters?

In PHP, use the function func_get_args to get all passed arguments.

<?php
function myfunc(){
    $args = func_get_args();
    foreach ($args as $arg)
      echo $arg."/n";
}

myfunc('hello', 'world', '.');
?>

An alternative is to pass an array of variables to your function, so you don't have to work with things like $arg[2]; and instead can use $args['myvar']; or rewmember what order things are passed in. It is also infinitely expandable which means you can add new variables later without having to change what you've already coded.

<?php
function myfunc($args){
    while(list($var, $value)=each($args))
      echo $var.' '.$value."/n";
}

myfunc(array('first'=>'hello', 'second'=>'world', '.'));
?>

PHP function with unlimited number of parameters

The above suggests are all good, but I don't think they will be suitable for your situation.

$stmt->bind_param('sssd', $code, $language, $official, $percent);

If you want to wrap this function, you will need to pass references to the original argument variables to the bind_param function. I don't think func_get_args() gives you this, it gives you values instead. Thus it won't be possible to use these to pass to the parent function. I battled with a similar issue when trying to extend mysqli_stmt and never came to satisfactory solution.

This is not really an answer to your question I'm afraid, just a warning that other arguments may not work in your particular application of arbitrary number of arguments.

Unlimited arguments for PHP function?

call_user_func_array('anotherFunc', func_get_args());

func_get_args returns an array containing all arguments passed to the function it was called from, and call_user_func_array calls a given function, passing it an array of arguments.

Functions With Unlimited Arguments in php

Use func_get_args() to access all arguments (as an array) passed to the function. Additionally, you can use func_num_args() to get a count of all arguments passed in.

function make_my_merge () {
    if ( func_num_args() ) {
        $args = func_get_args();
        echo join( ", ", $args );
    }
}

// Foo, Bar
make_my_merge("Foo", "Bar");

// Foo, Bar, Fizz, Buzz
make_my_merge("Foo", "Bar", "Fizz", "Buzz");

Codepad: http://codepad.org/Dk7MD18I

PHP Functions - Maximum number of arguments

Arguments to a function are pushed on a stack, after which the function is called which in turn reads the stack and uses those values as parameters.

So as long as the stack isn't full, you can keep adding parameters, but it'll depend on the situation, and at design-time you won't know the stack size.

But I really hope this is pure a technical discussion and you don't need it IRL. ;-)

How to work with infinity arguments in a function (like PHP's isset())

func_get_args will do what you want:

function infinite_parameters() {
    foreach (func_get_args() as $param) {
        echo "Param is $param" . PHP_EOL;
    }
}

You can also use func_get_arg to get a specific parameter (it's zero-indexed):

function infinite_parameters() {
    echo func_get_arg(2);
}

But be careful to check that you have that parameter:

function infinite_parameters() {
    if (func_num_args() < 3) {
        throw new BadFunctionCallException("Not enough parameters!");
    }
}

You can even mix together func_*_arg and regular parameters:

function foo($param1, $param2) {
    echo $param1; // Works as normal
    echo func_get_arg(0); // Gets $param1
    if (func_num_args() >= 3) {
        echo func_get_arg(2);
    }
}

But before using it, think about whether you really want to have indefinite parameters. Would an array not suffice?

How to pass variable number of arguments to a PHP function

If you have your arguments in an array, you might be interested by the call_user_func_array function.

If the number of arguments you want to pass depends on the length of an array, it probably means you can pack them into an array themselves -- and use that one for the second parameter of call_user_func_array.

Elements of that array you pass will then be received by your function as distinct parameters.

For instance, if you have this function :

function test() {
  var_dump(func_num_args());
  var_dump(func_get_args());
}

You can pack your parameters into an array, like this :

$params = array(
  10,
  'glop',
  'test',
);

And, then, call the function :

call_user_func_array('test', $params);

This code will the output :

int 3

array
  0 => int 10
  1 => string 'glop' (length=4)
  2 => string 'test' (length=4)

ie, 3 parameters ; exactly like iof the function was called this way :

test(10, 'glop', 'test');

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