note 42545 added to function.next

From: Date: Thu, 20 May 2004 20:36:05 +0000
Subject: note 42545 added to function.next
Groups: php.notes 
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This code returns neighbors of the specified key. The result will be empty if it doesn't have any neighbors. My approach was to use the order of keys to determine neighbors, which is differnet from just getting the next/previous element in an array. Feel free to point out stupidities :) <?php function array_neighbor($arr, $key) { krsort($arr); $keys = array_keys($arr); $keyIndexes = array_flip($keys); $return = array(); if (isset($keys[$keyIndexes[$key]-1])) $return[] = $keys[$keyIndexes[$key]-1]; if (isset($keys[$keyIndexes[$key]+1])) $return[] = $keys[$keyIndexes[$key]+1]; return $return; } ?> ---- Manual Page -- http://www.php.net/manual/en/function.next.php Edit -- http://master.php.net/manage/user-notes.php?action=edit+42545 Delete -- http://master.php.net/manage/user-notes.php?action=delete+42545&report=yes Reject -- http://master.php.net/manage/user-notes.php?action=reject+42545&report=yes Search -- http://master.php.net/manage/user-notes.php

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