Variable Arguments¶
Variable arguments refers to a methodcall where the list of argument is depends on the call, rather than the signature of the method.
Variable arguments are achieved with the variadic operator, or with the func_get_args() functions. Variadic operator covers most of the cases, and func_get_args() covers the remaining edge cases.
Variable arguments may be static or dynamic. It is static when the list of arguments varies from call to call, and are hard-coded. Dynamic argument list depends on variadic ... operator, or call_user_func_array() functions.
<?php
// No arguments in the signature.
function foo() {
// displays the list of arguments
print_r(func_get_args());
}
// static arguments
foo(1, 2);
foo(4, 5, 6);
// dynamic variable arguments
$args = range(5, rand(9, 11)) ;
foo(...$args);
?>
See also Variable-length argument lists and Named Arguments and Variadics in PHP 8.
Related : Functions, Variadic, func_get_args(), Three Dots
