Windows XP is 13 years old now, and despite it is no longer being supported by Microsoft it is still used worldwide. While Minecraft itself still supports Windows XP, Java itself will stop supporting XP with the Java 8 release. Shoghi Cervantes, the main developer for the PocketMine server software for Minecraft PE, announced this on his personal Twitter account:
PocketMine 1.4 is the next major update to PocketMine that will officially support PE 0.9.x as well as a new API. It also notes the drop for Windows Server 2003, which is the buisness/server equivalent of XP. See the source link for the original tweet.
Source: Twitter
PocketMine-MP 1.4 will use PHP 5.6 on all operating systems. That means that it won't work on Windows XP / 2003 anymore. If you are affected by it... You should consider using Linux or, only if you really want it... upgrade Windows. I recommend the first option.
PocketMine 1.4 is the next major update to PocketMine that will officially support PE 0.9.x as well as a new API. It also notes the drop for Windows Server 2003, which is the buisness/server equivalent of XP. See the source link for the original tweet.
Source: Twitter