將開放時間相似的日子結合起來

Question

我該如何編碼PHP中的函數（使用CodeIgniter）來將具有相似商店開放時間的日期合併在一起。例如，如果我們有：

Mon 9am-5pm 
Tue 9am-5pm 
Wed 9am-5pm 
Thu 9am-5pm 
Fri 9am-5pm 
Sat 9am-7pm 
Sun 9am-7pm 

我想要的代碼，將其簡化爲：

Mon-Fri 9am-5pm 
Sat-Sun 9am-7pm 

如何做到這一點沒有一長串的if/else或case IFS？我用笨..

Answer 1

<?php 
$openHours = array(
    'Mon' => '9am-5pm', 
    'Tue' => '9am-5pm', 
    'Wed' => '9am-9pm', 
    'Thu' => '9am-5pm', 
    'Fri' => '9am-5pm', 
    'Sat' => '9am-7pm', 
    'Sun' => '9am-7pm' 
); 

$summaries = array(); 
foreach ($openHours as $day => $hours) { 
    if (count($summaries) === 0) { 
     $current = false; 
    } else { 
     $current = &$summaries[count($summaries) - 1]; 
    } 
    if ($current === false || $current['hours'] !== $hours) { 
     $summaries[] = array('hours' => $hours, 'days' => array($day)); 
    } else { 
     $current['days'][] = $day; 
    } 
} 

foreach ($summaries as $summary) { 
    if (count($summary['days']) === 1) { 
     echo reset($summary['days']) . ' ' . $summary['hours'] . PHP_EOL; 
    } else { 
     echo reset($summary['days']) . '-' . end($summary['days']) . ' ' . $summary['hours'] . PHP_EOL; 
    } 
} 

codepad sample