Online PHP editor | output for IGNhd

<?php $now = time(); $yesterday = (new DateTime)->sub(new DateInterval('P1D')); $messages = [ // Yesteerday's messages [ 'user_id' => 1, 'user_natural_name' => 'me', 'timestamp' => $yesterday->setTime(19, 0)->format('U'), 'text' => 'Hiya' ], [ 'user_id' => 2, 'user_natural_name' => 'you', 'timestamp' => $yesterday->setTime(19, 5)->format('U'), 'text' => 'Hey, how are you?' ], // Today's messages [ 'user_id' => 1, 'user_natural_name' => 'me', 'timestamp' => $now, 'text' => 'Hello' ], [ 'user_id' => 2, 'user_natural_name' => 'you', 'timestamp' => $now + 3, 'text' => 'Hi' ], [ 'user_id' => 1, 'user_natural_name' => 'me', 'timestamp' => $now + 6, 'text' => 'What\'s up' ], [ 'user_id' => 2, 'user_natural_name' => 'you', 'timestamp' => $now + 9, 'text' => 'Not much' ], [ 'user_id' => 1, 'user_natural_name' => 'me', 'timestamp' => $now + 12, 'text' => 'Awesome' ] ]; $lastWindowDate = NULL; foreach ($messages as $index => $message) { $windowDate = date('Ymd', $message['timestamp']); if ($windowDate !== $lastWindowDate) { switch (date('Ymd', $message['timestamp'])) { case date('Ymd'): $dateLabel = 'today'; break; case $yesterday->format('Ymd'): $dateLabel = 'yesterday'; break; default: $dateLabel = $windowDate; break; } if ($index) echo "\n"; echo "$dateLabel\n"; $lastWindowDate = $windowDate; } echo "{$message['user_natural_name']}: " . date('H:i', $message['timestamp']) . " - {$message['text']}\n"; }