Another trick would be to not use function recursion, but a recursive iterator:
http://codepad.viper-7.com/9PeM9c function maxDepth(array $a) { $it2 = new RecursiveIteratorIterator( new RecursiveArrayIterator($a) ); $max = 0; foreach ($it2 as $val) { $max = max($max, $it2->getDepth()); } return $max; } It will actually process less data, since the RecursiveIteratorIterator mode is to skip non-leaf nodes (in other words, elements that are arrays). So the max() call will only ever be called for non-array values... A micro-optimization for sure, but something worth noting... Anthony On Fri, May 18, 2012 at 4:48 PM, justin <jus...@justinhileman.info> wrote: > function array_depth($el) { > return is_array($el) ? max(array_map('array_depth', $el)) + 1 : 0; > } > > var_dump(array_depth($array)); > > > -- justin > > > > On Fri, May 18, 2012 at 1:27 PM, Joey Derrico <joeyd...@gmail.com> wrote: >> I am trying to count the number of dimensions in an array. I used my >> google-fu and came up with answers that don't actually work because I can >> have multi-dimensional array's where one int he middle is multi and the one >> after not. Below is my latest set of test code (I have been playing with it >> for hours (with varying results), none correct), It currently returns 15 >> dimensions and should be returning 5 >> >> <?php >> echo "\n"; >> $test = new test(); >> >> $array = array(); >> $array[0] = '[0]'; >> $array[1][0] = '[1][0]'; >> $array[1][1] = '[1][1]'; >> $array[2][0][0] = '[2][0][0]'; >> $array[2][0][1] = '[2][0][1]'; >> $array[2][1][0] = '[2][1][0]'; >> $array[2][1][1] = '[2][1][1]'; >> $array[3][0][0][0] = '[3][0][0][0]'; >> $array[3][0][0][1] = '[3][0][0][1]'; >> $array[3][1][0][0] = '[3][1][0][0]'; >> $array[3][1][0][1] = '[3][1][0][1]'; >> $array[3][1][1][0] = '[3][1][1][0]'; >> $array[3][1][1][1] = '[3][1][1][1]'; >> $array[4][0][0][0][0] = '[4][0][0][0][0]'; >> $array[4][0][0][0][1] = '[4][0][0][0][1]'; >> $array[4][1][0][0][0] = '[4][1][0][0][0]'; >> $array[4][1][0][0][1] = '[4][1][0][0][1]'; >> $array[4][1][1][0][0] = '[4][1][1][0][0]'; >> $array[4][1][1][0][1] = '[4][1][1][0][1]'; >> $array[4][1][1][1][0] = '[4][1][1][1][0]'; >> $array[4][1][1][1][1] = '[4][0][0][0][1]'; >> $array[5][0][0][0] = '[5][0][0][0]'; >> $array[5][0][0][1] = '[5][0][0][1]'; >> $array[5][1][0][0] = '[5][1][0][0]'; >> $array[5][1][0][1] = '[5][1][0][1]'; >> $array[5][1][1][0] = '[5][1][1][0]'; >> $array[5][1][1][1] = '[5][1][1][1]'; >> $array[6][0][0] = '[6][0][0]'; >> $array[6][0][1] = '[6][0][1]'; >> $array[6][1][0] = '[6][1][0]'; >> $array[6][1][1] = '[6][1][1]'; >> $array[7][0] = '[7][0]'; >> $array[7][1] = '[7][1]'; >> $array[8] = '[8]'; >> >> echo 'The array has '.$test->countNumberOfDimensionsOfAnArray($array)." >> dimensions\n"; >> //echo print_r($array,TRUE); >> >> >> class test >> { >> public function isMultDimensionalArray($array) >> { >> $return = FALSE; >> >> if(is_array($array)){ >> foreach($array as $value){ >> if(is_array($value)){ >> $return = TRUE; >> } >> } >> } >> return $return; >> } >> >> public function countNumberOfDimensionsOfAnArray($array) >> { >> $dimensions = 0; >> >> if(is_array($array)){ >> $dimensions++; >> foreach($array as $key=>$value){ >> if($this->isMultDimensionalArray($value)){ >> $dimensions = $dimensions + >> $this->countNumberOfDimensionsOfAnArray($value); >> } >> } >> } >> return $dimensions; >> } >> } >> ?> >> >> Joey Derrico >> >> _______________________________________________ >> New York PHP User Group Community Talk Mailing List >> http://lists.nyphp.org/mailman/listinfo/talk >> >> http://www.nyphp.org/show-participation > > > > -- > http://justinhileman.com > _______________________________________________ > New York PHP User Group Community Talk Mailing List > http://lists.nyphp.org/mailman/listinfo/talk > > http://www.nyphp.org/show-participation _______________________________________________ New York PHP User Group Community Talk Mailing List http://lists.nyphp.org/mailman/listinfo/talk http://www.nyphp.org/show-participation
