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<?php
namespace SimpleSAML\Utils;
/**
* Array-related utility methods.
*
* @package SimpleSAMLphp
*/
class Arrays
{
/**
* Put a non-array variable into an array.
*
* @param array $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)) ? $data : array($index => $data);
}
/**
* Validate and normalize an array with attributes.
*
* This function takes in an associative array with attributes, and parses and validates
* this array. On success, it will return a normalized array, where each attribute name
* is an index to an array of one or more strings. On failure an exception will be thrown.
* This exception will contain an message describing what is wrong.
*
* @param array $attributes The array containing attributes that we should validate and normalize.
*
* @return array The normalized attributes array.
* @throws \SimpleSAML_Error_Exception If input is not an array, array keys are not strings or attribute values are
* not strings.
*
* @author Olav Morken, UNINETT AS <olav.morken@uninett.no>
* @author Jaime Perez, UNINETT AS <jaime.perez@uninett.no>
*/
public static function normalizeAttributesArray($attributes)
{
if (!is_array($attributes)) {
throw new \SimpleSAML_Error_Exception('Attributes was not an array. Was: '.print_r($attributes, true).'".');
}
$newAttrs = array();
foreach ($attributes as $name => $values) {
if (!is_string($name)) {
throw new \SimpleSAML_Error_Exception('Invalid attribute name: "'.print_r($name, true).'".');
}
$values = self::arrayize($values);
foreach ($values as $value) {
if (!is_string($value)) {
throw new \SimpleSAML_Error_Exception('Invalid attribute value for attribute '.$name.
': "'.print_r($value, true).'".');
}
}
$newAttrs[$name] = $values;
}
return $newAttrs;
}
/**
* 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;
}
$ret = array();
foreach ($array as $k1 => $a2) {
if (!is_array($a2)) {
return false;
}
foreach ($a2 as $k2 => $v) {
if (!array_key_exists($k2, $ret)) {
$ret[$k2] = array();
}
$ret[$k2][$k1] = $v;
}
}
return $ret;
}
}
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