Hi,
There is no fonction in PHP to read or write an integer or a long value from a file.

Actually, I read a 2 or 4 characters string, and convert it into the corresponding numeric value with this function :

function readNum( $f, $len )
{
	$tmp = strrev( fread( $f, $len ) );
	$val = 0;
	for( $i=0; $i<$len; $i++ )
		$val += ord(substr($tmp,$i,1)) * pow(256,$len-1-$i);
	return $val;
}

Regards,
Fred.