PHP学习札记（四）cookie-PHP Tutorial-php.cn

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PHP学习札记（四）cookie

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Jun 13, 2016 am 11:00 AM

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PHP学习笔记（四）cookie
1.setcookie() 函数用于设置 cookie
setcookie(name, value, expire, path, domain);
cookie常用于识别用户。setcookie() 函数必须位于标签之前。

2.$_COOKIE取回cookie的值

3.isset()函数来确认是否已设置了 cookie

<html><body><?phpif (isset($_COOKIE["user"])){  // Print a cookie  echo $_COOKIE["user"];  // A way to view all cookies  print_r($_COOKIE);}else  echo "Welcome guest!<br />";?></body></html>

4.cookie删除

<?php // set the expiration date to one hour agosetcookie("user", "", time()-3600);?>

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