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[mdref/mdref-http]
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getCookie.md
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# string http\Cookie::getCookie(string $cookie_name)
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Retrieve a specific cookie value.
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See http\Cookie::setCookie().
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## Params:
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* string $cookie_name
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The key of the cookie to look up.
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## Returns:
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* string, the cookie value.
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* NULL, if $cookie_name could not be found.