[SOLVED] Argument in Exception help

[sasori]

i saw this code snippet from the book that im reading

i don't understand what that 0000 means (from the the argument of the constructor of the Exception class, and also i don't know what the Exception class contains)

 

<?php
class PGSQLConnection extends Exception
{
    $message = "Sorry cannot connect to PostgreSQL server";
    parent::__construct($message,0000);
}

?>

[corbin]

http://php.net/exception

 

 

The second parameter is the 'code'.

[sasori]

http://php.net/exception

 

 

The second parameter is the 'code'.

 

does it have to be always a 4 digit number ?

[448191]

public __construct ([ string $message [, int $code ]] )

 

It has to be an integer.