Lecture 4 of "The Quickest to Understand PHP Programming": date, form reception, session, cookie_PHP Tutorial

Example 11: Date stamp, date display

Copy code The code is as follows:

echo time( );//Return a string of time stamps calculated in seconds
echo "
";
echo date("Y-m-d H:i:s",time()+8*3600);/ /Format time, +8*3600 becomes China time zone time
echo "
";
$str="2010-08-24 10:26:10";
echo date( "Y-m-d H:i:s",strtotime($str));//strtotime converts the string into a timestamp
echo "
";
?>

Example 12: Form variable encoding and reception

Copy code The code is as follows:

echo $str=urlencode("first page");//URL variable encoding, the same as google
echo "
".urldecode($str);//URL variable decoding, I saw it
echo "
First page";
echo "
";
if ($_GET)echo "Variable received:".$_GET['page'];//$_GET corresponds to $_POST, PHP automatically recognizes the URL encoding and decodes it automatically.
echo "
";
?>

Example 13: session usage

Copy code The code is as follows:

session_start();//session will expire immediately after the browser is closed. This declaration is needed to read and write the session
$_SESSION['id ']='server';//This is declaration and initialization, the same as array usage
$_SESSION['name']='session';
print_r($_SESSION);//session registration successful output An array
echo "
";
$_SESSION['id']='Still a server';//Change a session and then output it to see
unset($_SESSION['name' ]);//Log out a session and check the output again
print_r($_SESSION);
echo "
";
?>

Example 14 : Cookie usage

Copy code The code is as follows:

setcookie("id","Customer end");//This is the function that declares and initializes cookies. It will expire when you close the browser
setcookie("name","session",time()+3600);//It will expire after 1 hour from then on
print_r($_COOKIE);//session registration successfully outputs an array , you can also use $HTTP_COOKIE_VARS to access
echo "
";
setcookie("id", "Still client");//Change a session and then output it to see
unset($ _COOKIE['name']);//Log out a session and then output it, which is equivalent to setcookie("name","",time()-1); This is said in many books. In fact, unset can also be used Can log out
print_r($_COOKIE);
echo "
";
?>

http://www.bkjia.com/PHPjc/322477.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/322477.htmlTechArticleExample 11: Date stamp, date display copy code The code is as follows: ?php echo time();//Return one A string of time numbers stamped in seconds echo "br"; echo date("Y-m-d H:i:s",time()+8*3600);//Format...