I have a question regarding PHP. Is there any way I could make a function, which has a dynamic number of function inputs?
For example, let's call that function dynamic_func()
It should work in both of these cases, and also in other cases, not depending on number of functions input:
dynamic_func(1,2,3,4)
dynamic_func(1,2,3,4,5,6)
Thanks in advance!
It works as normal.
function dynamic_func()
{
$args=func_get_args(); //get all the arguments as an array
}
dynamic_func(1,2,3,4); //will work
dynamic_func(1,2,3,4,5,6); //will work
I believe PHP will never complain if you pass more arguments than those expected by a function. E.g.:
<?php
function foo($a) {
}
foo(); // invalid (Warning: Missing argument 1 for ...)
foo('a'); // valid
foo('a', 'b'); // surprise... valid!
So you can use func_get_args() and func_num_args() inside foo() to detect how many parameters were actually passed on to that function:
<?php
function foo(/*$a*/) {
echo func_num_args();
var_dump(func_get_args());
}
foo('a', 'b');
Rest is up to you.
there are two possibilitys to do this: using func_get_args like Shakti Singh explained or predefine the arguments like this
function myfunc($arg1 = 1, $arg2 = 2, $arg3 = 3){
echo $arg1.' '.$arg1.' '.$arg3;
}
myfunc(); // outputs "1 2 3";
myfunc(9,8); // outputs "9 8 3";
note that you can set the arguments to any default value that is used if the argument isn't given, but you'll have to define all arguments with this - it isn't as dynamic as using func_get_args.
