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Solving PHP Warning: putenv() has been disabled for security reasons in phar:

Report an error when using composer. This is because PHP has disabled the putenv() function.

PHP Warning: putenv () has been disabled for security reasons in phar:///usr/bin/composer/vendor/composer/xdebug-handler/src/Process.php on line 97
Warning: putenv() has been disabled for security reasons in phar:///usr/bin/composer/ vendor /composer/xdebug-handler/src/Process.php on line 97
PHP Warning: putenv() has been disabled for security reasons in phar:///usr/bin/composer/src/Composer/Util/Platform.php on line 78

Warning: putenv() has been disabled for security reasons in phar:///usr/bin/composer/src/Composer/Util/Platform.php on line 78

If using BT Linux Panel​

Just go to BT Linux Panel PHP configuration and delete the disabled function putenv.

Modify php.ini configuration​

To avoid modification errors! Please back up the original file before modifying it putenv! Modify the php configuration file, php.ini find the disable_function place, and remove putenv.