PHP

Allowed memory size of 1610612736 bytes exhausted (tried to allocate 4096 bytes) in phar:///usr/local/bin/composer/src/Composer/DependencyResolver/RuleWatchGraph.php on line 52

COMPOSER_MEMORY_LIMIT=-1 composer require the/library

PHP Fatal error: Allowed memory size of 1610612736 bytes exhausted (tried to allocate 4096 bytes)

php -d memory_limit=-1 /usr/local/bin/composer install

PHP Fatal error: Allowed memory size of 1610612736 bytes exhausted (tried to allocate 4096 bytes)

set COMPOSER_MEMORY_LIMIT=-1

Fatal error: Allowed memory size of 1610612736 bytes exhausted

Fatal error: Allowed memory size of 1610612736 bytes exhausted

export COMPOSER_MEMORY_LIMIT=-1
and restart composer update

Allowed memory size of 1610612736 bytes exhausted 4096

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

Allowed memory size of 1610612736 bytes exhausted (tried to allocate 4096 bytes) laravel

1. Firstly i find which php.ini is working because i was using multiple xampp,
  so using : php --ini
2. after that in that file i updated the memory_limit = -1    

PHP Fatal error: Allowed memory size of 1610612736 bytes exhausted

php --ini

nano /etc/php5/cli/php.ini (it could be different for you)

Search for memory_limit by (ctrl + w)
  
make memory_limit to -1 or 2G (depending on what you can increase to)
  
save by (ctrl + x) then enter

Fatal error: Allowed memory size of 1610612736 bytes exhausted (tried to allocate 32 bytes) in

;memory_limit=512M