Well, I need to be able to eliminate the repeated elements but keeping the last element, that is, eliminate the previous ones and leave the last one.
This is what I have
exists: [
0: {intervention_id: 2, exists: "yes"}
1: {intervention_id: 2, exists: "no"}
2: {intervention_id: 2, exists: "yes"}
3: {intervention_id: 5, exists: "yes"}
4: {intervention_id: 6, exists: "no"}
5: {intervention_id: 12, exists: "yes"}
]
I have to delete the previous ones.
0: {intervention_id: 2, exists: "yes"}
1: {intervention_id: 2, exists: "no"}
and leave this
2: {intervention_id: 2, exists: "yes"}
And this is what I need
exists: [
0: {intervention_id: 2, exists: "yes"}
1: {intervention_id: 5, exists: "yes"}
2: {intervention_id: 6, exists: "no"}
3: {intervention_id: 12, exists: "yes"}
]
I need to keep the last one and delete the previous ones
Try this but delete the last one not the previous ones.
function unique_multidim_array($array, $key) {
$temp_array = array();
$i = 0;
$key_array = array();
foreach($array as $val) {
if (!in_array($val[$key], $key_array)) {
$key_array[$i] = $val[$key];
$temp_array[$i] = $val;
}
$i++;
}
return $temp_array;
}
$data = [
[ 'intervention_id' => 2, 'exists' => 'yes' ],
[ 'intervention_id' => 2, 'exists' => 'no' ],
[ 'intervention_id' => 2, 'exists' => 'yes' ],
[ 'intervention_id' => 5, 'exists' => 'yes' ],
[ 'intervention_id' => 6, 'exists' => 'no' ],
[ 'intervention_id' => 12, 'exists' => 'yes' ]
];
$map = array_column($data, 'exists', 'intervention_id');
array_walk($map, function (&$value, $key) {
$value = [ 'intervention_id' => $key, 'exists' => $value ];
}, ARRAY_FILTER_USE_BOTH);
$result = array_values($map);
print_r($result);
You could simply override the value of the current element using the same key. In this case, you will always get the last element for each ID
function unique_multidim_array($array, $key) {
$uniq = [];
foreach($array as $val) {
$curVal = $val[$key]; // shortcut of the value
$uniq[$curVal] = $val; // override previous value if exists
}
return array_values($uniq); // array_values to re-index array
}
$exists = [
['intervention_id' => 2, 'exists' => 'yes'],
['intervention_id' => 2, 'exists' => 'no'],
['intervention_id' => 2, 'exists' => 'yes'],
['intervention_id' => 5, 'exists' => 'yes'],
['intervention_id' => 6, 'exists' => 'no'],
['intervention_id' => 12, 'exists' => 'yes'],
];
$uniq = unique_multidim_array($exists, 'intervention_id');
print_r($uniq);
Output:
Array(
[0] => Array(
[intervention_id] => 2
[exists] => yes
)
[1] => Array(
[intervention_id] => 5
[exists] => yes
)
[2] => Array(
[intervention_id] => 6
[exists] => no
)
[3] => Array(
[intervention_id] => 12
[exists] => yes
)
)