|
|
|
|
Bookmark this on Delicious
Share on Facebook
 Slashdot It!
Digg  array_diff_key
Computes the difference of arrays using keys for comparison
(PHP 5 >= 5.1.0)
Example 239. array_diff_key() example
The two keys from the <?phpThe above example will output: array(2) {Code Examples / Notes » array_diff_keyml
You may obtain this function with PEAR Package PHP_Compat (http://pear.php.net/package/PHP_Compat) Then using such code is quite useful <?php if(!function_exists('array_diff_key')){ require_once 'PHP/Compat/Function/array_diff_key.php'; } ?> ampf
Well, you could implement in the code something more powerfull: http://www.php.net/manual/en/function.array-diff.php#31364 maxence
Seems to be a great function, especially for n-dimensions arrays. The only problem is that I cannot find it in php 5.0.3 and 5.0.4. Does it really exist ?! :( [20:27:05][maxence@conurb] ~/test2/php-5.0.4$ grep PHP_FUNCTION * -r | grep -i array_diff_key [20:27:09][maxence@conurb] ~/test2/php-5.0.4$ kwutzke @ somewhere in the net
PHP4 array_diff_key can be copied from the array_intersect_key implementation posted by some anonymous user on 2006-07-17. The only thing you have to do is to delete the '!' in the if and rename the function.
vlad_mustafin
One more alternative variant :) <? if (!function_exists('array_diff_key')) { function array_diff_key() { $argCount = func_num_args(); $diff_arg_prefix = 'diffArg'; $diff_arg_names = array(); for ($i=0; $i < $argCount; $i++) { $diff_arg_names[$i] = 'diffArg'.$i; $$diff_arg_names[$i] = array_keys((array)func_get_arg($i)); } $diffArrString = ''; if (!empty($diff_arg_names)) $diffArrString = '$'.implode(', $', $diff_arg_names); eval("\$result = array_diff(".$diffArrString.");"); return $result; } } ?> denis noessler
if (!function_exists('array_diff_key')) { /** * Computes the difference of arrays using keys for comparison * * @param array $valuesBase Base elements for comparison, associative * @param array $valuesComp[,..] Comparison elements, associative * * @param array Elements, not existing in comparison element, associative */ function array_diff_key() { $argCount = func_num_args(); $argValues = func_get_args(); $valuesDiff = array(); if ($argCount < 2) { return false; } foreach ($argValues as $argParam) { if (!is_array($argParam)) { return false; } } foreach ($argValues[0] as $valueKey => $valueData) { for ($i = 1; $i < $argCount; $i++) { if (isset($argValues[$i][$valueKey])) { continue 2; } } $valuesDiff[$valueKey] = $valueData; } return $valuesDiff; } } 2ge
Hello, if you need diff key of n-dimensional arrays here is nice solution: <?php function n_array_diff ($a1, $a2) { foreach($a1 as $k => $v) { $r[$k] = is_array($v) ? n_array_diff($a1[$k], $a2[$k]) : array_diff_key($a1, $a2); } return $r; } ?> it will print everything, what is missing in $a2. nicolas
Be aware that the last solution doesn't work if for any reason, two values are the same.
contact
after kwutzke's comment , here is a PHP4 array_diff_key fonction for those in need function PHP4_array_diff_key() { $arrs = func_get_args(); $result = array_shift($arrs); foreach ($arrs as $array) { foreach ($result as $key => $v) { if (array_key_exists($key, $array)) { unset($result[$key]); } } } return $result; } works for me, enjoy. eric dot broersma
<?php function array_diff_key() { $args = func_get_args(); return array_flip(call_user_func_array('array_diff', array_map('array_flip',$args))); } ?> |
Change Language
array_change_key_case array_chunk array_combine array_count_values array_diff_assoc array_diff_key array_diff_uassoc array_diff_ukey array_diff array_fill_keys array_fill array_filter array_flip array_intersect_assoc array_intersect_key array_intersect_uassoc array_intersect_ukey array_intersect array_key_exists array_keys array_map array_merge_recursive array_merge array_multisort array_pad array_pop array_product array_push array_rand array_reduce array_reverse array_search array_shift array_slice array_splice array_sum array_udiff_assoc array_udiff_uassoc array_udiff array_uintersect_assoc array_uintersect_uassoc array_uintersect array_unique array_unshift array_values array_walk_recursive array_walk array arsort asort compact count current each end extract in_array key krsort ksort list natcasesort natsort next pos prev range reset rsort shuffle sizeof sort uasort uksort usort |
