Never, since PHP is fundamentally flawed, and trying to redesign it would make the split between Python 2 and 3 pale in comparison. PHP's main selling point is backwards compatibility and the existing ecosystem; a fundamental redesign would remove that. PHP's name is also mud when it comes to programming language design, and its community is notorious for poor practices, so no one's really clamoring for a more modern PHP.
The bitter truth for PHP stans is that it is what it is, you can get things done, and you can have valid reasons for using it (like legacy reasons, job market, etc.), but it's rightfully trending down and will continue to.
The bitter truth for PHP stans is that it is what it is, you can get things done, and you can have valid reasons for using it (like legacy reasons, job market, etc.), but it's rightfully trending down and will continue to.