Magento – Composer error when try install extension

composermagento2.3

I'm getting this when i'm trying to install an extension.

Warning: Unsupported declare 'strict_types' in
/home/SITE_NAME/public_html/vendor/magento/inventory-composer-installer/src/Plugin.php
on line 6

Parse error: syntax error, unexpected ':', expecting ';' or '{' in
/home/SITE_NAME/public_html/vendor/magento/inventory-composer-installer/src/Plugin.php
on line 55

I have : CentOS Linux release 7.5.1804 (Core); PHP 7.2 (via cPanel) ; Latest magento 2.3.3 CE

php -v
PHP 5.6.40 (cli) (built: Oct 29 2019 08:07:50)

Need Some Help

Best Answer

either you could update your php to 7.X version or downgrade your ProxyManager. this will fix your problem.

Related Solutions

Magento – Install extension using composer Magento 2

Follow below steps to install magento2 extension (2.1.7)

cd <your Magento install dir>
composer require <component-name>:<version> --no-update
composer update
bin/magento setup:upgrade
bin/magento setup:di:compile

Source: http://devdocs.magento.com/guides/v2.1/cloud/howtos/install-components.html

Magento – how to install extension without composer

To make sure your module is installed successfully, please modify/check these things:

Open app/etc/config.php and find your module registered name here. The value should be 1.
Access table setup_module in your database, find your module registered name here. It must be listed here with valid values of schema_version and data_version.
If 1 & 2 are ok, you don't need to run setup:upgrade command again. Just clear the cache by using these commands below (I don't use Magento commands because sometimes they do not work as expected):
```
rm -rf pub/static/frontend
rm -rf var/cache
rm -rf var/page_cache
rm -rf var/view_preprocessed
```
Reload your Frontend to get result.

Notice: Do not remove .htaccess file in pub/static folder.

Best Answer

Related Solutions

Magento – Install extension using composer Magento 2

Magento – how to install extension without composer

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