Collapses a multi-dimensional array into a single dimension, using a delimited array path
for each array element's key, i.e. array(array('Foo' => array('Bar' => 'Far'))) becomes
array('0.Foo.Bar' => 'Far').
Parameters
- array $data array to flatten
- array $options Available options are: - `'separator'`: String to separate array keys in path (defaults to `'.'`). - `'path'`: Starting point (defaults to null).
Returns
arraySource
public static function flatten($data, array $options = array()) {
$defaults = array('separator' => '.', 'path' => null);
$options += $defaults;
$result = array();
if (!is_null($options['path'])) {
$options['path'] .= $options['separator'];
}
foreach ($data as $key => $val) {
if (!is_array($val)) {
$result[$options['path'] . $key] = $val;
continue;
}
$opts = array('separator' => $options['separator'], 'path' => $options['path'] . $key);
$result += (array) static::flatten($val, $opts);
}
return $result;
}