PHP setcookie () function usage

A cookie is like a session in php, but one on the client is on the server. Next I will introduce in detail the setcookie setting and deletion code in php.

Setcookie () syntax

Setcookie (PHP 3, PHP 4, PHP 5)

Setcookie -- send a cookie

Note: bool setcookie (string name [, string value [, int expire [, string path [, string domain [, bool secure])

Example

Write cookie

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<? Php $ Value = 'something from somewhere '; Setcookie ("TestCookie", $ value ); Setcookie ("TestCookie", $ value, time () + 3600);/* expire in 1 hour */ Setcookie ("TestCookie", $ value, time () + 3600 ,"/~ Rasmus/"," example.com ", 1 ); ?>

Read cookie

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<? Php // Print an individual cookie Echo $ _ COOKIE ["TestCookie"]; Echo $ HTTP_COOKIE_VARS ["TestCookie"]; // Another way to debug/test is to view all cookies Print_r ($ _ COOKIE ); ?>

Delete cookie

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<? Php // Set the expiration date to one hour ago Setcookie ("TestCookie", "", time ()-3600 ); Setcookie ("TestCookie", "", time ()-3600 ,"/~ Rasmus/"," example.com ", 1 ); ?>

Because of the specific cookie and HTTP methods, you must send all cookies before you output any text. Otherwise, PHP will give a warning and the cookie will not be sent. Therefore, this is correct:

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<? Php Setcookie ('name', 'jeff '); Echo "Hello Everyone !"; ?>

The following is an error:

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<? Php Echo "Hello Everyone !"; Setcookie ('name', 'jeff '); ?>