If you are using composer in your php project, you might encounter the the same error as mine.
PHP Fatal error: Allowed memory size of 536870912 bytes exhausted (tried to allocate 71 bytes) in phar:///sf2projects/myproject/composer.phar/src/Composer/DependencyResolver/RuleWatchGraph.php on line 47
To solve this PHP fatal error allowed memory size exhausted problem, refer to the solution below:-
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