Can someone explain this error?

[eluser]vitoco[/eluser]
[quote author="mhel_dc" date="1257767825"]

Code:

// if you change "" to '' , non of the code inside the string will we interpreted as variable or constant,
//and if you have a constant inside, you'll have concatenate
$db['abora']['hostname'] = '(DESCRIPTION =(ADDRESS_LIST =(ADDRESS = (PROTOCOL = TCP)(HOST = oraserver.domain.com)(PORT = 1522)))(CONNECT_DATA =(SERVICE_NAME = orasid)))';