runff 1.0 commit

lib/SimpleSAML/Utils/Arrays.php

@@ -0,0 +1,60 @@
+<?php
+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)) ? $data : array($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;
+        }
+
+        $ret = array();
+        foreach ($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;
+    }
+}