Problem with PHP

[fakhamatia]

I use aha in PHP code for colorize output. But output text not ok. why?

exec("inxi -c 2 | aha -n > inxi.html", $returnOut, $stdout);

12CPU Quad Core AMD Ryzen 5 3550H with Radeon Vega Mobile Gfx (-MT MCP-) 
12speed/min/max 2762/1400/2100 MHz 12Kernel 5.13.0-40-generic x86_64 12Up 8h 15m 
12Mem 14955.5/15704.2 MiB (95.2%) 12Storage 464.97 GiB (18.7% used) 12Procs 660 
12Client Unknown Client: php7.2 12inxi 3.3.06