Hello James, It is difficult to offer even an appropriate release date for PHP versions. Development speed is known to depend on many factors, testing results are not known in advance, and decisions might be taken in the last moment. Assuming you use App Engine Flexible, you'll need to still stay with PHP version 7.2 for now. What are the advantages of 7.3 that you find important for your application? What features are sorely needed, that only 7.3 offers? A feature request needs the support of a well-motivated use case to prove its point and convince.
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