Fatal error: Allowed memory size of 1610612736 bytes exhausted (tried to allocate 67108872 bytes) in phar code example

Example 1: Allowed memory size of 1610612736 bytes exhausted

export COMPOSER_MEMORY_LIMIT=-1

Example 2: how to fix PHP Fatal error: Allowed memory size of 1610612736 bytes exhausted

php -d memory_limit=-1 composer.phar require hwi/oauth-bundle php-http/guzzle6-adapter php-http/httplug-bundle

Example 3: Allowed memory size of 33554432 bytes exhausted (tried to allocate 43148176 bytes) in php

ini_set('memory_limit', '-1');