Say i have an array like this one:
array [
0 => array [
'id' => 1,
'name' => 'John',
'address' => 'Some address 1'
'city' => 'NY'
],
1 => array [
'id' => 2,
'name' => 'Jack',
'address' => 'Some address 2'
'city' => 'NY'
]
…
10 => array [ ... ]
]
How can i filter this array so that i keep structure but only have keys id and name and their values?
One way is to build a new array and copy the values you like
$newArray = [];
foreach($existingArray as $existingItem)
{
$newItem['id'] = $existingItem['id'];
$newItem['name'] = $existingItem['name'];
$newArray[] = $newItem;
}
or without the use of a temporary variable:
$newArray = [];
foreach($existingArray as $existingItem)
{
$newArray[] = [
'id' => $existingItem['id'],
'name' => $existingItem['name']
];
}
Or you could do it this way ->
<?php
$myArray = [
0 => [
'id' => 1,
'name' => 'John',
'address' => '1313 Mockingbird Lane',
'city' => 'NY'
],
1 => [
'id' => 2,
'name' => 'Jill',
'address' => '13 Monster Lane',
'city' => 'Detroit'
]
];
echo '<pre>' . print_r($myArray, 1) . "</pre>";
foreach ($myArray as $array) {
$output[] = array_slice($array, 0, 2);
}
echo "<pre>" . print_r($output, 1) . "</pre>";
That way if you array changes you just change the slice offset.
or filter it with a custom function
<?php
$myArray = [
0 => [
'id' => 1,
'name' => 'John',
'address' => '1313 Mockingbird Lane',
'city' => 'NY'
],
1 => [
'id' => 2,
'name' => 'Jill',
'address' => '13 Monster Lane',
'city' => 'Detroit'
]
];
array_walk($myArray, function(&$item){ unset($item['address'], $item['city']); });
print_r($myArray);
/*
Array
(
[0] => Array
(
[id] => 1
[name] => John
)
[1] => Array
(
[id] => 2
[name] => Jill
)
)