Fatal error: Composer detected issues in your platform: Your Composer dependencies require a PHP version ">= 7.3.0". You are running 7.2.34. in /var/www/html/vendor/composer/platform_check.php on line 24 code example

Example 1: Composer detected issues in your platform: Your Composer dependencies require a PHP version ">= 7.3.0".

composer install --ignore-platform-reqs

Example 2: Composer detected issues in your platform: Your Composer dependencies require a PHP version ">= 7.3.0".

#add to composer.json > config
"platform-check": false,

composer autoload-dump

Example 3: Composer detected issues in your platform: Your Composer dependencies require a PHP version ">= 7.3.0".

composer install --ignore-platform-reqs

or 
 #add to composer.json > config
"platform-check": false,

composer autoload-dump

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Php Example