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Associative Array - Change Position

There is this array for this:

[food] => Array ( [fruits] => apple [vegetables] => garlic [nuts] => cashew [meat] => beaf )

I need to change the position of a specific key combination.

Say I need to move [fruit] => apple to third position

 [food] => Array ( [vegetables] => garlic [nuts] => cashew [fruits] => apple [meat] => beaf )

I'm not talking about sorting by key or value. I need to change the key value position to a very strict new position.

Sort of:

 change_pos($my_arr, $key_to_move, $new_index);

=>

 change_pos($my_arr, "fruits", 3);

Is it possible?

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3 answers

It was difficult, but finally

 <?php function array_splice_assoc(&$input, $offset, $length, $replacement) { $replacement = (array) $replacement; $key_indices = array_flip(array_keys($input)); if (isset($input[$offset]) && is_string($offset)) { $offset = $key_indices[$offset]; } if (isset($input[$length]) && is_string($length)) { $length = $key_indices[$length] - $offset; } $input = array_slice($input, 0, $offset, TRUE) + $replacement + array_slice($input, $offset + $length, NULL, TRUE); } function array_move($which, $where, $array) { $tmpWhich = $which; $j=0; $keys = array_keys($array); for($i=0;$i<count($array);$i++) { if($keys[$i]==$tmpWhich) $tmpWhich = $j; else $j++; } $tmp = array_splice($array, $tmpWhich, 1); array_splice_assoc($array, $where, 0, $tmp); return $array; } $array = array('fruits' => 'apple','vegetables' => 'garlic','nuts' => 'cashew','meat' => 'beaf'); $res = array_move('vegetables',2,$array); var_dump($res); ?>
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I would like to thank MIIB for his hard work! I will accept his answer for hard work.

But I came up with a solution that suits me better, and I will use it.

 function ksort_arr (&$arr, $index_arr) { $arr_t=array(); foreach($index_arr as $i=>$v) { foreach($arr as $k=>$b) { if ($k==$v) $arr_t[$k]=$b; } } $arr=$arr_t; } $arr=array("fruits"=>"apple","vegetables"=>"garlic","nuts"=>"cashew","meat"=>"beaf"); $index_arr=array("vegetables","meat","fruits","nuts"); ksort_arr($arr,$index_arr); print_r($arr);

result

 Array ( [vegetables] => garlic [meat] => beaf [fruits] => apple [nuts] => cashew )
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Here is a much simpler solution using a second array. It also provides some basic verification of the new index parameter. Designed for use only with associative arrays. It makes no sense to use with numeric arrays.

 function array_move($key, $new_index, $array) { if($new_index < 0) return; if($new_index >= count($array)) return; if(!array_key_exists($key, $array)) return; $ret = array(); $ind = 0; foreach($array as $k => $v) { if($new_index == $ind) { $ret[$key] = $array[$key]; $ind++; } if($k != $key) { $ret[$k] = $v; $ind++; } } // one last check for end indexes if($new_index == $ind) $ret[$key] = $array[$key]; return $ret; }
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