Print the keys of an array

Question

I could not figure out how to pass a variable number of variables into a function. I thought passing in an array and using the array keys for the variables names could repla

Answer 1

foreach(array_keys($parameters) as $key) {
   echo $key.'<br/>';
}

Answer 2

Passing an associative array to a function is a reasonable way to pass in a variable number of parameters.

foreach ($parameters as $key => $value) {
  echo $key . ' = ' . $value . '<br>';
}

Alternatively you could pass in an instance of stdClass (casting the argument to an object). But an array does the job.

I assume your array keys aren't constants, in which case they should be quoted strings:

$parameters['day'] = 1;
$parameters['month'] = 8;
$parameters['year'] = 2010;