--- /dev/null
+<?php
+
+/**
+ * arrays.php
+ *
+ * Copyright (c) 2004 The SquirrelMail Project Team
+ * Licensed under the GNU GPL. For full terms see the file COPYING.
+ *
+ * Contains utility functions for array operations
+ *
+ * @version $Id$
+ * @package squirrelmail
+ */
+
+ /**
+ * Swaps two array values by position and maintain keys
+ *
+ * @param array $a (recursive) array
+ * @param mixed $v1 value 1
+ * @param mixed $v2 value 2
+ * @return bool $r true on success
+ * @author Marc Groot Koerkamp
+ */
+ function sqm_array_swap_values(&$a,$v1,$v2) {
+ $r = false;
+ if (in_array($v1,$ar) && in_array($v2,$a)) {
+ $k1 = array_search($v1,$a);
+ $k2 = array_search($v1,$a);
+ $d = $a[$k1];
+ $a[$k1] = $a[$k2];
+ $a[$k2] = $d;
+ $r = true;
+ }
+ return $r;
+ }
+
+
+ /**
+ * Move array value 2 array values by position and maintain keys
+ *
+ * @param array $a (recursive) array
+ * @param mixed $v value to move
+ * @param int $p positions to move
+ * @return bool $succes
+ * @author Marc Groot Koerkamp
+ */
+function sqm_array_kmove_value(&$a,$v,$p) {
+ $r = false;
+ $a_v = array_values($a);
+ $a_k = array_keys($a);
+ if (in_array($v, $a_v)) {
+ $k = array_search($v, $a_v);
+ $p_n = $k + $p;
+ if ($p_n > 0 && $p_n < count($a_v)) {
+ $d = $a_v[$k];
+ $a_v[$k] = $a_v[$p_n];
+ $a_v[$p_n] = $d;
+ $d = $a_k[$k];
+ $a_k[$k] = $a_k[$p_n];
+ $a_k[$p_n] = $d;
+ $r = array_combine($a_k, $a_v);
+ if ($a !== false) {
+ $a = $r;
+ $r = true;
+ }
+ }
+ }
+ return $r;
+}
+
+ /**
+ * Move array value 2 array values by position. Does not maintain keys
+ *
+ * @param array $a (recursive) array
+ * @param mixed $v value to move
+ * @param int $p positions to move
+ * @return bool $succes
+ * @author Marc Groot Koerkamp
+ */
+function sqm_array_move_value(&$a,$v,$p) {
+ $r = false;
+ $a_v = array_values($a);
+ if (in_array($v, $a_v)) {
+ $k = array_search($v, $a_v);
+ $p_n = $k + $p;
+ if ($p_n >= 0 && $p_n < count($a_v)) {
+ $d = $a_v[$k];
+ $a_v[$k] = $a_v[$p_n];
+ $a_v[$p_n] = $d;
+ $a = $a_v;
+ $r = true;
+ }
+ }
+ return $r;
+}
+
+ /**
+ * Retrieve an array value n positions relative to a reference value.
+ *
+ * @param array $a array
+ * @param mixed $v reference value
+ * @param int $p offset to reference value in positions
+ * @return mixed $r false on failure (or if the found value is false)
+ * @author Marc Groot Koerkamp
+ */
+function sqm_array_get_value_by_offset($a,$v,$p) {
+ $r = false;
+ $a_v = array_values($a);
+ if (in_array($v, $a_v)) {
+ $k = array_search($v, $a_v);
+ $p_n = $k + $p;
+ if ($p_n >= 0 && $p_n < count($a_v)) {
+ $r = $a_v[$p_n];
+ }
+ }
+ return $r;
+}
+
+
+if (!function_exists('array_combine')) {
+ /**
+ * Creates an array by using one array for keys and another for its values (PHP 5)
+ *
+ * @param array $aK array keys
+ * @param array $aV array values
+ * @return mixed $r combined array on succes, false on failure
+ * @author Marc Groot Koerkamp
+ */
+ function array_combine($aK, $aV) {
+ $r = false;
+ $iCaK = count($aK);
+ $iCaV = count($aV);
+ if ($iCaK && $iCaV && $iCaK == $iCaV) {
+ $aC = array();
+ for ($i=0;$i<$iCaK;++$i) {
+ $aC[$aK[$i]] = $aV[$i];
+ }
+ $r = $aC;
+ }
+ return $r;
+ }
+}
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