Link Checking With php Script

Ok, i honestly have no idea where to begin with this but I am trying to make a script that will go through a certain amount of URL's and look for one of them that is valid.

Basicly I am trying to make a script that will look at the following URL.
mywebsite.com/atn/1b7da100.htm
see if it is a valid page, if it returns a 404 it will move to page
mywebsite.com/atn/1b7da101.html
So it will check through all pages 100-999 until it finds the right url then it will stop.
mywebsite.com/atn/1b7da(changethisnumber).html

Any suggestions on how i could accomplish this?

 

mostly you will need to use
file_get_contents

and check the return value if false or not

 

<?php
for($i=100; $i<=999; $i++)
{
	$ch = curl_init();
	
	curl_setopt($ch, CURLOPT_URL, 'mywebsite.com/atn/1b7da' . $i . '.html');
	curl_setopt($ch, CURLOPT_USERAGENT, "Mozilla/4.0 (compatible; MSIE 5.01; Windows NT 5.0)");
	curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
		
	$response  = curl_exec($ch);
	$http_code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
		
	curl_close($ch);
	
	if($http_code != "404")
	{
		echo $response;
		break;
	}
}

PHP:

Untested but should work. If a 404 isn't returned it'll output the contents of the page.

 

CURL would be ur best bet