Php regex espression for alphanumeric with dot and slash -

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this question has answer here:

i'm trying validate string , want contains alphanumeric chars like: a-za-z , 0-9 want string can contain dot , slash ('.', '/').

i tryed in way, don't right result.

if (!preg_replace('/[^a-za-z0-9./]/', '', (string)$value)){         return false; }

thanks help

just escape required values inside case.

if (!preg_replace('/[^a-za-z0-9\.\/]/', '', (string)$value)){     return false; }

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