get Meta Description from websites

getMetaData.php

<?php
  /**
   * get Meta Tags from weblinks
   * 
   * input for this script is data.txt
   * data.txt contains weblinks. Every line a new weblink. 
   * 
   * use this php script from command line
   * $ cat data.txt|while read LINE;do php ./getMetaTags.php $LINE>>output.csv
   * 
   * script was needed to move Byte.nl/wiki to Byte.nl/kennisbank
   */
   
	function file_get_contents_curl($url)
	{
		$ch = curl_init();

		curl_setopt($ch, CURLOPT_HEADER, 0);
		curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
		curl_setopt($ch, CURLOPT_URL, $url);
		curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);

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

		return $data;
	}

	$url = $argv[1];

	$pattern = "https://www.byte.nl/wiki/";
	$slug = strtolower(substr($url, strlen($pattern)));

	$html = file_get_contents_curl($url);

	//parsing begins here:
	$doc = new DOMDocument();
	@$doc->loadHTML($html);
	$nodes = $doc->getElementsByTagName('title');

	//get and display what you need:
	$title = $nodes->item(0)->nodeValue;

	$metas = $doc->getElementsByTagName('meta');

	for ($i = 0; $i < $metas->length; $i++)
	{
		$meta = $metas->item($i);
		if($meta->getAttribute('name') == 'description')
			$description = $meta->getAttribute('content');
		if($meta->getAttribute('name') == 'keywords')
			$keywords = $meta->getAttribute('content');
	}

	/*echo "URL: $url". '<br/><br/>';
	echo "Title: $title". '<br/><br/>';
	echo "Description: $description". '<br/><br/>';
	echo "Keywords: $keywords";*/

	echo "\"$slug\";\"$description\"\n";