Dynamic functions, variable inputs
Right now, lets say I have code much like this...
$some_var=returnsUserInput();
function funcA($a) {...}
function funcB($a,$b) {...}
function funcC($a,$b,$c) {...}
$list[functionA] = "funcA";
$list[functionB] = "funcB";
$list[functionC] = "funcC";
$temp_call = list开发者_C百科[$some_var];
//Not sure how to do this below, just an example to show the idea of what I want.
$temp_call($varC1,varC2,$varC3);
$temp_call($varB1,varB2);
$temp_call($varA1);
My problem starts here, how can I specify the proper variables into the arguments depending on these? I have a few thoughts such as creating a list for each function that specifies these, but I would really like to see an elegant solution to this.
You need to use call_user_func or call_user_func_array.
<?php
// if you know the parameters in advance.
call_user_func($temp_call, $varC1, $varC2);
// If you have an array of params.
call_user_func_array($temp_call, array($varB1, $varB2));
?>
You want something like the following?
function test()
{
$num_args = func_num_args();
$args = func_get_args();
switch ($num_args) {
case 0:
return 'none';
break;
case 1:
return $args[0];
break;
case 2:
return $args[0] . ' - ' . $args[1];
break;
default:
return implode($args, ' - ');
break;
}
}
echo test(); // 'none'
echo test(1); // 1
echo test(1, 2); // 1 - 2
echo test(1, 2, 3); // 1 - 2 - 3
It'd act as some sort of delegation method.
Or what about just accepting an array rather than paramaters?
function funcA($params)
{
extract($params);
echo $a;
}
function funcB($params)
{
extract($params);
echo $a, $b;
}
function funcC($params)
{
extract($params);
echo $a, $b, $c;
}
$funcs = array('funcA', 'funcB', 'funcC');
$selected = $funcs[0];
$selected(array('a' => 'test', 'b' => 'test2'));
// or something like (beware of security issues)
$selected($_GET);
You can't and maybe that's good to. You can find the amount of arguments with if/else.
if($temp_call == "funcA") { .....} elseif(...)...
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