How to autocorrect a line in a large number of .php files on Linux?

Question

linux

Please tell me the syntax of the Linux command so that you can do auto-replacement of the line (search and replace) in a large number of php-files located in one folder (about a million files). There are many options, but the fastest one is needed.
Tried:

time find ./ -type f -exec sed -i 's/TEXT-1/TEXT-2/g' {} \;

- works, but works slowly (I went through a million files for a week and did not finish it)
They suggested another command:

find -type f -name '*.php' -print0 | xargs -0 -P 8 sed -i -- 's/TEXT-1/TEXT-2/g'

- which should cope quickly, but does not work, after a while it gives errors:

sed: -e expression #1, char 1: unknown command: `�'

Please tell me the correct command syntax to cope with the task. Thank you.

Answer 1

figured it out
In the end - a working solution, can someone come in handy

Answer 2

Choose any: https://unix.stackexchange.com/questions/112023/ho...

Answer 3

What happens if you add -z to sed ?

`-z'
`--null-data'
`--zero-terminated'
     Treat the input as a set of lines, each terminated by a zero byte
     (the ASCII `NUL' character) instead of a newline.  This option can
     be used with commands like `sort -z' and `find -print0' to process
     arbitrary file names.