Pseudo-DOS Line Ending Character

[kebbelj]

On a Windows XP machine, I wanted to loop through a list of ip numbers and use ping -a to extract the domain names as strings. The loop worked fine. However, when I attempted to echo just the line containing the domain name, I hit a snag. The line endings in the text file are not real line endings. The split statement leaves you with just one array element. Does anyone know what character(s) the Pseudo-DOS in XP uses to end lines, i.e., what I should have used instead of "\n" in my split command?

Second, related question. In the old ASCII days, many programs let you feed a character into ORD or some similar function, and it returned the ASCII number. How would you do that in PHP? Would it be Unicode instead of ASCII?

<?php

for ($i = 0; $i <= 255; $i++)
{
	$ip = "66.115.151.".$i;
	`ping -a $ip >> domains.txt`;
	echo "ping -a ".$ip."\n";
}

$filename = "C:\Documents and Settings\John\domains.txt";
$fh = fopen($filename, "r");
$contents = fread($fh, filesize($filename) );
fclose ($fh);

$line = split("\n", $contents);
# echo count($contents);

foreach ($line as $value)
{
	if ( ereg( "pinging", $value) )
	{
		echo $value."\n";
	}
}

?>

[NogDog]

DOS text files use the "\r\n" sequence as the line delimiter. If you are sure that will be the delimiter, it will be a bit more efficient to use explode():

$line = explode("\r\n", $contents);

If it may or may not have the "\r", then preg_split() would be the way to go (again, the preg functions tend to be more efficient than the ereg counterparts (of which split() is one):

$line = preg_split('/\r?\n/', $contents);

Or, if you want to skip any empty lines:

$line = preg_split('/[\r\n]+/', $contents);

[zabmilenko]

And for your other question, see ord();

This function is singlebyte. In the user examples, there are uniord() functions, which should return multibyte ords/unicodes.

[bradgrafelman]

What's wrong with simply using [man]gethostbyaddr/man ?