Allowed memory size of 536870912 bytes exhausted (tried to allocate 4096 bytes) code example

Example 1: Allowed memory size of 1610612736 bytes exhausted

export COMPOSER_MEMORY_LIMIT=-1

Example 2: 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

Example 3: 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

Example 4: Fatal error: Allowed memory size of 536870912 bytes exhausted (tried to allocate 119541600 bytes) in C:\xampp\htdocs\backup-vice.php on line 67

<?php 
ini_set('memory_limit', '1024M'); // or you could use 1G

?>

Example 5: 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