[SOLVED] Help with IRC bot script

[Swords]

I know I'm a noob at php, but I know what all the functions do and I understand how this function works, but I can't figure out the cause of this error message I'm getting.

Running this in the console, I get PHP Notice: undefined offset on lines 215, 250, 251, and 252.

[code]<?php
function parse_buffer()
{

/*
:username!~identd@hostname JOIN :#php
:username!~identd@hostname PRIVMSG #PHP :action text
:username!~identd@hostname command channel :text
*/

global $con, $CONFIG;

$buffer = $con['buffer']['all'];
$buffer = explode(" ", $buffer, 4);

  $buffer['all'] = $con['buffer']['all']; //fix undefined key error
/* Get username */
$buffer['username'] = substr($buffer[0], 1, strpos($buffer['0'], "!")-1);

/* Get identd */
$posExcl = strpos($buffer[0], "!");
$posAt = strpos($buffer[0], "@");
$buffer['identd'] = substr($buffer[0], $posExcl+1, $posAt-$posExcl-1);
$buffer['hostname'] = substr($buffer[0], strpos($buffer[0], "@")+1);

/* The user and the host, the whole shabang */
$buffer['user_host'] = substr($buffer[0],1);

/* Isolate the command the user is sending from
the "general" text that is sent to the channel
This is  privmsg to the channel we are talking about.

We also format $buffer['text'] so that it can be logged nicely.
*/
switch (strtoupper($buffer[1])) //line 215
{
case "JOIN":
  $buffer['text'] = "*JOINS: ". $buffer['username']." ( ".$buffer['user_host']." )";
$buffer['command'] = "JOIN";
$buffer['channel'] = $CONFIG['channel'];
  break;
case "QUIT":
  $buffer['text'] = "*QUITS: ". $buffer['username']." ( ".$buffer['user_host']." )";
$buffer['command'] = "QUIT";
$buffer['channel'] = $CONFIG['channel'];
  break;
case "NOTICE":
  $buffer['text'] = "*NOTICE: ". $buffer['username'];
$buffer['command'] = "NOTICE";
$buffer['channel'] = substr($buffer[2], 1);
  break;
case "PART":
  $buffer['text'] = "*PARTS: ". $buffer['username']." ( ".$buffer['user_host']." )";
$buffer['command'] = "PART";
$buffer['channel'] = $CONFIG['channel'];
  break;
case "MODE":
  $buffer['text'] = $buffer['username']." sets mode: ".$buffer[3];
$buffer['command'] = "MODE";
$buffer['channel'] = $buffer[2];
break;
case "NICK":
$buffer['text'] = "*NICK: ".$buffer['username']." => ".substr($buffer[2], 1)." ( ".$buffer['user_host']." )";
$buffer['command'] = "NICK";
$buffer['channel'] = $CONFIG['channel'];
break;

default:
// it is probably a PRIVMSG
$buffer['command'] = $buffer[1]; //line 250
$buffer['channel'] = $buffer[2]; //line 251
$buffer['text'] = substr($buffer[3], 1); //line 252
break;
}
$con['buffer'] = $buffer;
}
?>[/code]

I assume it means that it can't find $buffer[1] $buffer[2] and $buffer[3], but my (limited) understanding tells me that they should be left over from the explode(" ", $buffer, 4) at the beginning of the function.

[Swords]

Thanks to Tom on #phpfreaks.