will file_exist() php function cause high server load?

i am trying to check if user uploaded his or her avatar image and i use file_exist() php function to check if the user avatar image exist or not

will this cause any server load problem with massive traffic webs开发者_JAVA技巧ites ?

thanks

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No it will not, here is the documentation for file_exists. It also caches the results, so that further improves performance.

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The exact same question has been asked here before.

The short answer was: no.