Filter data to display only entries made in July

data_filter.php

<?php

$data = [
    (object) [
        'name' => 'Ring [A0123]',
        'price' => 25,
        'created_at' => '2016-07-20'
    ],

    (object) [
        'name' => 'Pendant [A0124]',
        'price' => 55,
        'created_at' => '2016-07-17'
    ],

    (object) [
        'name' => 'Earrings [A0125]',
        'price' => 15,
        'created_at' => '2016-06-20'
    ],

    (object) [
        'name' => 'Bracelet [ABCDE]',
        'price' => 15,
        'created_at' => '2016-06-23'
    ]
];

/**
 * Get data from the specified month.
 *
 * @param array $data
 * @param int $month
 * @return array|bool
 */
function getMonthData($data, $month) {
    if ($month < 1 || $month > 12) {
        return false;
    }

    return array_filter($data, function ($item) use ($month) {
        $created_date = date_parse($item->created_at);

        return $created_date['month'] === $month;
    });
}

// Get all data for July = 7
print_r(getMonthData($data, 7));