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@ 2020-06-11T02:00:14Z

<?php
$array = [
    (object)['label' => 'Test 1', 'session' => 2],
    (object)['label' => 'Test 2', 'session' => 2],
    (object)['label' => 'Test 3', 'session' => 42],
    (object)['label' => 'Test 4', 'session' => 9],
];

echo sizeof(array_column($array, null, 'session'));

Output
Performance
VLD
References
Branches

array_column: documentation ( source)

preferences:dark modelive previewkey bindings

35.88 ms | 404 KiB | 5 Q