如何将一天中的时间分成3个桶：早上，下午和晚上？

Question

I'm looking to count values from an array that contain a certain number. Basically, I'm looking to plot a graph os visits, and want to do it as 'morning', 'afternoon' and 'evening'. So I want to count times, such as 17:38 as 17, then count them so I can classify if visits were morning, afternoon or evening.

$time_array = array("17:45","13:12","09:29","17:32","16:49","14:18");

$counts = array_count_values($time_array);
$morning_counts = $counts['09'] + $counts['10'] + $counts['11'];
$afternoon_counts = $counts['12'] + $counts['13'] + $counts['14'] + $counts['15'] + $counts['16'];
$evening_counts = $counts['17'] + $counts['18'] + $counts['19'] + $counts['20'] + $counts['21'] + $counts['22'] + $counts['23'];

Expected output from sample data:

$morning_counts = 1
$afternoon_count = 3
$evening_counts = 2

Answer 1

You can do this by creating counter variables. We can then create ranges of time frames using range(). Then get the values before the : in the time string as the hour and then compare that against the range, if it's in the range, add 1 to the counter.

<?php
    $time_array = array("17:45","13:12","09:29","17:32","16:49","14:18");

    # create counter vars
    $mornCount = 0;
    $afternoonCount = 0;
    $eveCount = 0;

    # create range of times to compare against
    $mornRange = range(0, 11);
    $afternoonRange = range(12, 16);
    $eveRange = range(17, 23);

    foreach ($time_array as $time)
    {
        $compareTimeArr = explode(':', $time); # get first two chars of time
        $compareTime = $compareTimeArr[0];

        if (in_array($compareTime, $mornRange)) {
            $mornCount++;
        } elseif (in_array($compareTime, $afternoonRange)) {
            $afternoonCount++;
        } elseif (in_array($compareTime, $eveRange)) {
            $eveCount++;
        }
    }

    echo '<pre>'. print_r($mornCount,1) .'</pre>';
    echo '<pre>'. print_r($afternoonCount,1) .'</pre>';
    echo '<pre>'. print_r($eveCount,1) .'</pre>';

refs:

https://secure.php.net/manual/en/function.in-array.php

https://secure.php.net/manual/en/function.explode.php

https://secure.php.net/manual/en/function.range.php