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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. |