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<?php
declare(strict_types=1);
namespace SimpleSAML\Utils;
/**
* Array-related utility methods.
*
* @package SimpleSAMLphp
*/
class Arrays
{
/**
* Put a non-array variable into an array.
*
* @param mixed $data The data to place into an array.
* @param mixed $index The index or key of the array where to place the data. Defaults to 0.
*
* @return array An array with one element containing $data, with key $index, or $data itself if it's already an
* array.
*
* @author Andreas Solberg, UNINETT AS <andreas.solberg@uninett.no>
* @author Jaime Perez, UNINETT AS <jaime.perez@uninett.no>
*/
public static function arrayize($data, $index = 0)
{
return (is_array($data)) ? $data : [$index => $data];
}
/**
* This function transposes a two-dimensional array, so that $a['k1']['k2'] becomes $a['k2']['k1'].
*
* @param array $array The two-dimensional array to transpose.
*
* @return mixed The transposed array, or false if $array is not a valid two-dimensional array.
*
* @author Andreas Solberg, UNINETT AS <andreas.solberg@uninett.no>
*/
public static function transpose($array)
{
if (!is_array($array)) {
return false;
}
$ret = [];
foreach ($array as $k1 => $a2) {
if (!is_array($a2)) {
return false;
}
foreach ($a2 as $k2 => $v) {
if (!array_key_exists($k2, $ret)) {
$ret[$k2] = [];
}
$ret[$k2][$k1] = $v;
}
}
return $ret;
}
}
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