V5 backwards compatible?

From: Ken Williams <kenw232@xxxxxxxxx>
Date: Sun, 16 Jul 2006 16:50:24 -0400

so is PHP 5 (Version 5.1.4) 100% backwards compatible with 4? I'm running 4.4.2 and was looking for any comments or consideration before I upgrade to 5. I'm hoping its fully transparent, anyone have any experience with this?

Thanks.
kenw232@xxxxxxxxx
.

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