Php 将特定日期计算为一个1字

我有很多约会。格式如下：

August 28, 2016 at 09:20AM
August 28, 2016 at 09:20AM
August 28, 2016 at 09:26AM
August 28, 2016 at 09:26AM
August 28, 2016 at 09:26AM

我希望结果是这样的：

August 28, 2016 at 09:20AM = 2
August 28, 2016 at 09:26AM = 3

---

每一行用新行分开（在键盘上输入）。我怎样才能做到这一点呢？

将其放入一个数组中，然后执行以下操作：

array_keys(array_count_values($array));

PHP代码

<?php
    $s = 'August 28, 2016 at 09:20AM
August 28, 2016 at 09:20AM
August 28, 2016 at 09:26AM
August 28, 2016 at 09:26AM
August 28, 2016 at 09:26AM';
    $s = explode(PHP_EOL, $s);
    $s = array_count_values($s);
    var_dump($s);
    print_r($s);
?>

---

将其放入数组并执行以下操作：

array_keys(array_count_values($array));

PHP代码

<?php
    $s = 'August 28, 2016 at 09:20AM
August 28, 2016 at 09:20AM
August 28, 2016 at 09:26AM
August 28, 2016 at 09:26AM
August 28, 2016 at 09:26AM';
    $s = explode(PHP_EOL, $s);
    $s = array_count_values($s);
    var_dump($s);
    print_r($s);
?>