I want avoid several ifs and my question is:
Is there a function or a way to add several arrays ($a, $b) to an array, but only if an array ($a, $b) is not empty?
Given:
$a = ['foo' => 'bar'];
$b = [];
My code:
$c = [];
if (count($a))
{
$c['a'] = $a;
}
if (count($b))
{
$c['b'] = $b;
}
Yes, I need string keys with a specific name.
If all of your elements are arrays then you can easily cast out the empty ones with array_filter. For example, taking advantage of the fact that your keys are equal to variable names you can simply do
$c = array_filter(compact('a', 'b'));
Well, how about
$c = array_filter(compact('a', 'b'));
Just kidding. I don't really recommend this. "Smart(ass)" code sucks, especially in php. Be verbose, be readable.
(Looks like the OP didn't get the joke. Too bad...)
You can do the following:
$c = array();
function addToC(){
foreach(func_get_args() as $arg){
if(is_array($arg) && !empty($arg){
$c[] = $arg;
}
}
}
It's horribly hacky, and just covering up for bad design, but there are variable variables:
$to_do = array('a', 'b');
foreach ($to_do as $key) {
if (count($$key)) {
$c[$key] = $$key;
}
}
Note the doubled $. e.g.
php > echo $bar;
PHP Notice: Undefined variable: bar in php shell code on line 1
php > $foo = 'bar';
php > $$foo = 'baz';
php > echo $bar;
baz
