รบกวนถามการจัดกลุ่มช่วงเวลาค่ะ เช่น 09.00-15.00 และ 11.00-20.00 ให้รวมกันและแสดงเป็น 09.00-20.00

<?php
	$times = array(
		array(
			"start"	=> 1100,
			"end"	=> 1400
			),
		array(
			"start"	=> 1300,
			"end"	=> 1700
			),
		array(
			"start"	=> 1900,
			"end"	=> 1200
			)
		);
	$combined = array();
	$i = 0;
	$combined[0] = array_shift($times);
	foreach($times AS $time){
		if($combined[$i]['end']>=$time['start']) $combined[$i]['end'] = $time['end'];
		else{
			$i++;
			$combined[$i] = $time;
		}
	}

	var_dump($combined);

<?php
$times = array(
		array(
			"start"	=> 100,
			"end"	=> 1700
			),
		array(
			"start"	=> 1900,
			"end"	=> 2100
			),
		array(
			"start"	=> 1800,
			"end"	=> 2300
			)
		);
	$combined = array();
	$i = 0;
	$combined[0] = array_shift($times);
	foreach($times AS $time){
		$pass = false;
		if($combined[$i]['end']>=$time['start']){
			$combined[$i]['end'] = $time['end'];
			$pass = true;
		}
		if($combined[$i]['start']>=$time['start']){
			$combined[$i]['start'] = $time['start'];
			$pass = true;
		}
		if(!$pass){
			$i++;
			$combined[$i] = $time;
		}
	}

	var_dump($combined);