I would like to know how to do a multidimensional array interaction without using foreach.
$arr1 = array('id' => 1, 'nome' => 'Joao');
$arr2 = array('id' => 2, 'nome' => 'Maria');
$arrTotal = array($arr1, $arr2);
I want to get only the id fields. So I want a result like this: [1, 2] .
Thanks.
If you are using PHP 5.5 or higher, you can take advantage of the array_column function.
$result = array_column($total_array, 'id');
And it will be as simple as that.
For versions prior to 5.5, you can create the array_column function yourself
if(!function_exists("array_column")) {
function array_column($array,$column_name) {
return array_map(function($element) use ($column_name) {
return $element[$column_name];
}, $array);
}
}
Or just use the array_map
$result = array_map(function($item) {
return $item['id'];
}, $arrayTotal);
I think your question does not really express what you are trying to say. In the way you describe it, you would simply do it this way:
$arr1 = array('id' => 1, 'nome' => 'Joao');
$arr2 = array('id' => 2, 'nome' => 'Maria');
$arrTotal = array($arr1['id'], $arr2['id']);
However, perhaps $arr1 and $arr2 are elements of another array, such as this:
$map = array(
array('id' => 1, 'nome' => 'Joao'),
array('id' => 2, 'nome' => 'Maria'),
array('id' => 7, 'nome' => 'Pedro'),
);
With this structure, your question makes sense because there will actually be an iteration. Without foreach:
$map = array(
array('id' => 1, 'nome' => 'Joao'),
array('id' => 2, 'nome' => 'Maria'),
array('id' => 7, 'nome' => 'Pedro'),
);
$result = array_map(function($a) { return $a['id']; }, $map);