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| A1:
                         | The setcookie() function enables you to set a cookie (although you could also output a Set-Cookie header using the header() function).  | 
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| A2:
                         | You can delete a cookie by calling setcookie() with a date that has already passed.  | 
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| A3:
                         | The urlencode() function translates a string so that it can be included in a query string.  | 
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| A4:
                         | The entire query string is made available to you in the $_SERVER['QUERY_STRING'] element.  | 
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| A5:
                         | The $_GET array contains the name/value pairs submitted as part of a query string.  |