WP req's PHP 4.2, Yet 4.3 functions used

[DD32]

Currently WordPress requires PHP 4.2, however, There are few PHP 4.3+ functions in use around WP which do not have a compat function:

ob_get_flush() = wp-includes/widgets.php
html_entity_decode() - wp-admin/import/blogger.php, wp-includes/widgets.php
ob_get_clean() - wp-admin/plugins.php

Any other PHP 4.3+ functions either have logic im place to use alternate methods, or there is a compatible function in compat.php for it.

[ryan]

Requirement bumped to 4.3. [6662]

[Nazgul]

The included readme.html also needs to be updated to mention PHP 4.3.

Patch attached.

[westi]

(In [6667]) Update the required version in the readme too. Fixes #5416 props Nazgul.