1. When executing: composer install, prompt: enqueue/rdkafka 0.10.19 requires ext-rdkafka -> It is missing from your system. install or enable phps rdkafka extension.. as shown in Figure 1

PS E:\wwwroot\object> composer install
Installing dependencies from lock file (including require-dev)
Verifying lock file contents can be installed on current platform.
Your lock file does not contain a compatible set of packages. Please run composer update.
Problem 1
- enqueue/rdkafka is locked to version 0.10.19 and an update of this package was not requested.
- enqueue/rdkafka 0.10.19 requires ext-rdkafka ^4.0|^5.0|^6.0 -> it is missing from your system. Install or enable PHP's rdkafka extension.
To enable extensions, verify that they are enabled in your .ini files:
- C:\php-7.4.27\php.ini
You can also run `php --ini` in a terminal to see which files are used by PHP in CLI mode.
Alternatively, you can run Composer with `--ignore-platform-req=ext-rdkafka` to temporarily ignore these required extensions.
2. Decide to enable PHP’s RDKAFKA extension. Open:https://pecl.php.net/package/rdkafka/6.0.1/windows, download 7.4 Thread Safe (ts) x64. After decompressing php_rdkafka-6.0.1-7.4-ts-vc15-x64, put php_rdkafka.dll Copy to: C:\php-7.4.27\ext\php_rdkafka.dll. Then edit php.ini, add extension=rdkafka
3. When restarting php, an error is reported: php warning: php startup: unable to load dynamic libraryrdkafka. as shown in Figure 2

PS C:\Users\Lenovo> php-cgi.exe -b 127.0.0.1:9000-c C:/php-7.4.27/php.ini
PHP Warning: PHP Startup: Unable to load dynamic library 'rdkafka' (tried: C:/php-7.4.27/ext\rdkafka (鎵句笉鍒版寚瀹氱殑妯″潡銆?, C:/php-7.4.27/ext\php_rdkafka.dll (鎵句 笉鍒版寚瀹氱殑妯″潡銆?) in Unknown on line 0
<br />
<b>Warning</b>: PHP Startup: Unable to load dynamic library 'rdkafka' (tried: C:/php-7.4.27/ext\rdkafka (鎵句笉鍒版寚瀹氱殑妯″潡銆?, C:/php-7.4.27/ext\php_rdkafka.dll (鎵句笉鍒版寚瀹氱殑妯″潡銆?) in <b>Unknown</b> on line <b>0</b><br />
4. Reference:https://arnaud.le-blanc.net/php-rdkafka-doc/phpdoc/rdkafka.installation.windows.htmlInstalling the rdkafka extension on Windows. Put librdkafka.dll into the php root directory (same level as php.exe), and put the php_rdkfaka.dll file into php Extended directory (default is “ext”). Copy librdkafka.dll to: c:\php-7.4.27\librdkafka.dll. When restarting PHP, no errors are reported.
5. Check phpinfo, search: rdkafka, php’s rdkafka extension has been successfully enabled. as shown in Figure 3

6. Execute: When composer install, no longer prompt, run normally. as shown in Figure 4

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