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Migrating from PHP 5.1.x to PHP 5.2.x
PHP Manual

New Parameters

Some functions were given new, optional, parameters in PHP 5.2.x:

PHP Core:

curl:

datetime

imap:

mbstring:

ming:

openssl:

pgsql:

simplexml:

spl:

xmlreader:

XMLWriter:


Migrating from PHP 5.1.x to PHP 5.2.x
PHP Manual