$text = get_string_between($contents,"<script>var categoryJson =","</script>");

https://today.line.me/th/article/df7e6a27d63574ba146fbfc8526f6a197508b56784dbb57577e82d74f4426d82

preg_match_all ("/https://today.line.me/th/article/(.*)"/U", $text, $result);

<?php
	function get_contents($url){
		$ch = curl_init(); 
		curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
		curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
		curl_setopt($ch, CURLOPT_USERAGENT,"Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/41.0.2227.0 Safari/537.36");
		curl_setopt($ch, CURLOPT_URL, $url); 

		$data = curl_exec($ch); 
		curl_close($ch);
		return $data;
	}

	function get_string_between($string,$start,$end){
		$arr = explode($start,$string);
		$arr = explode($end,$arr[1]);
		return $arr[0];
	}

	$url = "https://today.line.me/th";
	$contents = get_contents($url);

	$text = get_string_between($contents,"<script>var categoryJson =","</script>");

	preg_match_all ("/https://today.line.me/th/article/(.*)"/U", $text, $result);

	echo "<pre>";
	print_r($result);
	echo "</pre>";
?>

<?php
/* old function 2016-12-14
function get_string_between($string,$start,$end){
	$arr = explode($end,$string);
	$arr = explode($start,$arr[0]);
	return $arr[1];
}
*/

function get_string_between($string,$start,$end){
	$arr = explode($start,$string);
	$arr = explode($end,$arr[1]);
	return $arr[0];
}
?>