How to keep this element in this array? - php

Question

I have the following array.
array(
[PM-AAA] => Array
(
[codePm] => PM-32249
[codeArt] => Array
(
[0] => 32249
)
[codeArtInFlux] => Array
(
[0] => 123456
)
)
[PM-BBB] => Array
(
[codePm] => PM-32249
[codeArt] => Array
(
[0] => 33270
)
[codeArtInFlux] => Array
(
[0] => 484946
)
)
[PM-CCC] => Array
(
[codePm] => PM-82242
[codeArt] => Array
(
[0] => 82242
[1] => 82245
[2] => 82246
)
[codeArtInFlux] => Array
(
[0] => 5191
[1] => 51949
[2] => 26486
)
)
)
I want keep the array where the "codePm" value is unique. For exemple, in the above array, the "PM-CCC" array will be keep, because the "codePm" is unique, contrary to the "PM-AAA" and "PM-BBB", which share the same "codePm"'s value.
Is it possible to do it with one function ?

Answer 1

As I know, there isn't any function that do it directly, you can try this:
function insert_unique_key($key_name,$elem,&$array) {
//Get all elements with the key
$values=array()
foreach ($array as $ii) {
$values[]=$ii[$key_name];
}
//Check if the value exists
if (in_array($elem[$key_name], $values)===FALSE) {
$array[]=$elem;
}
}
And in your code:
insert_unique_key('codePm',$elem_to_insert,$array_of_elements);
And you have to do it for each element of your array into a new array
--
EDIT: Sorry, this is for insert new unique values into the array, not for obtain the unique values.
Looking at the comments, I think you want only unique values Try this function:
function get_uniques_by_subkey($key_name,$array) {
//Get all elements with the key
$values=array();
foreach ($array as $ii) {
$values[]=$ii[$key_name];
}
//Get the elements that only appeared one time
$count=array_count_values($values);
unset($values);$values=array();
foreach ($count as $key => $n) {
if ($n==1)
$values[]=$key;
}
//Get the values
$out=array();
foreach ($array as $key => $value) {
if (in_array($value[$key_name],$values))
$out[$key]=$value;
}
return $out;
}
You can check the result here: http://codepad.org/QmuoYxsk

Answer 2

Something like this ?
<?
function removeDuplicatesByKey($a, $k) {
$r = array();
$tmp = array();
foreach ($a as $ind => $arr) {
$elem_found = array_search($arr[$k], $tmp);
if ($elem_found === false) {
$tmp[] = $arr[$k];
$r[$ind] = $arr;
} else {
// ok, element found, need to remove both ..
foreach ($r as $index => $r_arr) {
if ($r_arr[$k] == $arr[$k]) {
unset($r[$index]);
}
}
}
}
return $r;
}
$full_arr = array(
'PM-AAA' => array
(
'codePm' => 'PM-32249',
'codeArt' => array(
'0' => 32249
),
'codeArtInFlux' => array(
'0' => 123456
)
)
,
'PM-BBB' => array
(
'codePm' => 'PM-32249',
'codeArt' => array
(
'0' => 33270
),
'codeArtInFlux' => array
(
'0' => 484946
)
)
,
'PM-CCC' => array
(
'codePm' => 'PM-82242',
'codeArt' => array
(
'0' => 82242,
'1' => 82245,
'2' => 82246
),
'codeArtInFlux' => array
(
'0' => 5191,
'1' => 51949,
'2' => 26486
)
)
);
print_r(removeDuplicatesByKey($full_arr, 'codePm'));
?>
Output
Array
(
[1] => Array
(
[codePm] => PM-82242
[codeArt] => Array
(
[0] => 82242
[1] => 82245
[2] => 82246
)
[codeArtInFlux] => Array
(
[0] => 5191
[1] => 51949
[2] => 26486
)
)
)

Answer 3

I made this....on speed mode in my work....you can improve it ;)
$array = array(
'PM-AAA' => array(
'codePm' => 'PM-32249',
'codeArt' => array(32249),
'codeArtInFlux' => array(123456)
),
'PM-BBB' => array(
'codePm' => 'PM-32249',
'codeArt' => array(33270 ),
'codeArtInFlux' => array(484946)
),
'PM-CCC' => array(
'codePm' => 'PM-82242',
'codeArt' => array(82242,82245,82246),
'codeArtInFlux' => array(5191,51949,26486)
)
);
$code_count = array();
$arr2 = array();
foreach($array as $counter) {
$key = $counter['codePm'];
$code_count[] = $key;
}
$arr2 = (array_count_values($code_count));
print_r($arr2); //now i know how many times my code is repeated
while ($code_name = current($arr2)) {
if ($code_name == 1) {
$unique_code = key($arr2);
}
next($arr2);
}
echo $unique_code."</br>"; //i have my unique code
foreach ($array as $key) {
var_dump($key);
if($key['codePm']==$unique_code)
$arr_aux = $key;
}
echo "I have mi array ready with the unique val ;) </br>";
var_dump($arr_aux);
Saludos ;)