Forum Moderators: coopster
I tried [1-553] but that only matched numbers 1 2 3 4 and 5. (As I specified numbers 1-5, and then respecified numbers 5 and 3...)
The only other method I can think of is incredibly time consuming... and goes something like:
if number is 1 digit, accept 1-9
if number is 2 digits, accept 1-9 for first digit, 0-9 for second digit
if number is 3 digits, accept 1-5 for first digit, 0-9 for the second and third digits, BUT if first number is 5, then second digit can only be a max of 5, and if that is true, then the last digit can only be a maximum of 3...
Has anybody come across a solution to this before? I'm not even sure of the search terms to help me find one...
This might give you some ideas:
preg_match('#([0-9]{1,3})#',$string,$number);if(isset($number[1]) && !empty($number[1]) {
$NumberToCheck=intval($number[1]);
if($NumberToCheck > 0 && $NumberToCheck <= 553) {
/* Do Stuff Here */
}
else {
echo 'Number Did Not Match';
}
}
else {
echo 'No Number Found';
}
However, it almost entirely defeats the purpose of using a regular expression in the first place, does it not?
Is there a web scripting language that would accept the regex [1-553]? Or is there possibly (hopefully!) a more elegant way to do so in PHP?
I'm trying to match port:ip combinations, as quickly as possible. If that helps you at all.
The problem arises when I come across this combo for example:
123.123.123.123:99999
123.123.123.123 is a perfectly valid ip address, and the port is only 5 numbers long, which is normally fine, but a port can go no higher than 65535.
I'm trying to match port:ip combinations, as quickly as possible. If that helps you at all.
Sure does: I wouldn't use a regular expression...
You can perform more specific checks than I am here but this is the base I would work from personally.
$IP = '123.123.123.123:99999';$Check_IP_Port = explode(':',$IP);
$IP=explode('.',$Check_IP_Port[0]);if( isset($Check_IP_Port) && !empty($Check_IP_Port[1])
&& intval($Check_IP_Port[1])>0 && intval($Check_IP_Port[1])<=65535
) {echo 'Valid Port';
}
else {
echo 'Invalid Port';
}if(is_array($IP) && count($IP) == 4
&& intval($IP[0]) > 0 && intval($IP[0]) <= 256
&& intval($IP[1]) > 0 && intval($IP[1]) <= 256
&& intval($IP[2]) > 0 && intval($IP[2]) <= 256
&& intval($IP[3]) > 0 && intval($IP[3]) <= 256
) {echo 'Valid IP';
}else {
echo 'Invalid IP';
}
EDITED: Variable Name & added an intval() I omitted from the first if & I really just like editing my posts... lol.
[1][edited by: TheMadScientist at 4:12 am (utc) on Dec. 17, 2009]
if(strpos($IP,':')!==FALSE) {
/* explode() on : here */
/* explode() on . here */
/* check [1] here */
}
else {
/* explode() on . here */
}/* always check $IP here */
I'll let you figure out all the logic of the if / else in this post, but the preceding two posts are the fastest, simplest way I can think of to do what you are asking...
I wouldn't use a regular expression...
I'm sorry, I wasn't entirely clear!
I'm extracting these ip:port combinations from a larger block of text, so I can't simply input the $IP because I don't know what it is yet.
I was using regular expressions find the ip:port combinations from the block of text using preg_match_all - I don't think there's any other way it can be done :S
Thank you oh so much for your help however, TheMadScientist! I will most likely end up using regular expressions to find them, and your php scripts to clean them up!
