note 106723 added to function.array-merge-recursive

From walf's code, I just did 3 little changes: - keep numbered keys as sometimes there is no need to reverse them to 0 - initialized $merged by the first array since there is no need to loop for that array - stripped the "if (!$array) continue;" as this will be done by the foreach anyhow Further I changed the example values a bit to make it more easy to understand for beginners (as I am) which values will survive and which came from what array: single digits from first, 4 digits from second, larger from third <?php function lf_array_merge_recursive_add_or_overwrite() { if (func_num_args() < 2) { trigger_error( __FUNCTION__ .' needs two or more array arguments', E_USER_WARNING); return false; } $arrays = func_get_args(); $merged = array_shift($arrays); while($arrays) { $array = array_shift($arrays); if (!is_array($array)) { trigger_error(__FUNCTION__ .' encountered a non array argument', E_USER_WARNING); return false; }; foreach ($array as $key => $value) { if (is_array($value) && array_key_exists($key, $merged) && is_array($merged[$key])) { $merged[$key] = call_user_func(__FUNCTION__, $merged[$key], $value); }else{ $merged[$key] = $value; }; }; }; return $merged; }; $a1[88] = 1; // will stay $a1['foo'] = 2;// will be overwritten and converted into array $a1['bar'][] = 4;// will be overwritten and converted from array to num val $a1['x'] = 5; // will stay $a1['z'][] = 6; // will be overwritten $a1['z']['m'] = 'hi'; // will be overwritten $a1[100][] = 1; // will be overwritten $a1[100]['xxx'] = 'a1 stay';// will stay $a2[99] = 7000; // add $a2['foo'][] = 8000; // overwrite, exists, convert from num to array $a2['bar'] = 9000; // overwrite, coverting array into num val $a2['y'] = 1000; // add $a2['z']['m'] = 'bye'; // overwrite, exsts $a2['z'][] = 2000; // overwrite, exists $a3['z'][99] = 99999999; // add $a3['z']['m'] = 'a3 ciao';// overwrite, exists $a3[100][] = 5555555;// overwrite, exists $a3[100]['yyy'] = 'a3 new one';// add //print_r( $a1 ); //print_r( $a2 ); //print_r( $a3 ); echo "*++++ array_merge() now\n"; print_r( array_merge($a1, $a2, $a3) ); echo "*++++ array_merge_recursive_add_or_overwrite() follows\n"; print_r( lf_array_merge_recursive_add_or_overwrite($a1, $a2, $a3)); echo "*++++ array_merge_recursive() follows \n"; print_r( array_merge_recursive($a1, $a2, $a3)); ?> ---- Server IP: 69.147.83.197 Probable Submitter: 83.42.181.160 ---- Manual Page -- http://www.php.net/manual/en/function.array-merge-recursive.php Edit -- https://master.php.net/note/edit/106723 Del: integrated -- https://master.php.net/note/delete/106723/integrated Del: useless -- https://master.php.net/note/delete/106723/useless Del: bad code -- https://master.php.net/note/delete/106723/bad+code Del: spam -- https://master.php.net/note/delete/106723/spam Del: non-english -- https://master.php.net/note/delete/106723/non-english Del: in docs -- https://master.php.net/note/delete/106723/in+docs Del: other reasons-- https://master.php.net/note/delete/106723 Reject -- https://master.php.net/note/reject/106723 Search -- https://master.php.net/manage/user-notes.php