初学PHP的18个基础例程

＄login="你已经登陆"; // succesful message when user are logged in ( NOT NECESSARY )
//===========================

// DO NOT EDIT NOTHING BELOW!

if ((!isset(＄PHP_AUTH_USER)) || (!isset(＄PHP_AUTH_PW))) {

/* No values: send headers causing dialog box to appear */

header('WWW-Authenticate: Basic realm="＄site_com"');

header('HTTP/1.0 401 Unauthorized');

echo '<h1>访问的页面被限制.</h1>请检查你的用户名或密码是否正确，正常登陆本站才能查看 本站的内容';
exit;

} else if ((isset(＄PHP_AUTH_USER)) && (isset(＄PHP_AUTH_PW))){
/* Values contain some values, so check to see if they're correct */

if ((＄PHP_AUTH_USER != "＄admin_user_name") || (＄PHP_AUTH_PW != "＄admin_password")) { /* If either the username entered is incorrect, or the password entered is incorrect, send the headers causing dialog box to appear */

header('WWW-Authenticate: Basic realm="＄site_com"');
header('HTTP/1.0 401 Unauthorized');
echo '<h1>访问的页面被限制.</h1>请检查你的用户名或密码是否正确，正常登陆本站才能查看 本站的内容';
exit;
} else if ((＄PHP_AUTH_USER == "＄admin_user_name") || (＄PHP_AUTH_PW == "＄admin_password")) { echo "＄login
";
}
}

?>

　　保存为log.php,把下列代码加到head页内，那么将会保护所有的页面。

<? require("log.php");?>

　　十四、制作一个自动转向：

<?php

header("Refresh:0; url=http://webjx.com");

?>

　　必须保存为php文件才可以。

　　十五。制作用户列表：

<?
＄customer[0] = 'webjx';
＄customer[1] = 'web';
＄customer[2] = 'mutou';
＄customer[3] = 'chuxia';
＄customer[4] = 'shenhua';
echo "第3个用户是： ＄customer[2]";

echo "

所有的用户:

";

＄number = 5;
＄x = 0;
while (＄x < ＄number) {
＄customernumber = ＄x + 0;
echo "Costumer Name ＄customernumber is ＄customer[＄x]
";
++＄x;
}
?>
将会显示：
The third customer is mutou

所有的用户:

Costumer Name 0 is webjx
Costumer Name 1 is web
Costumer Name 2 is mutou
Costumer Name 3 is chuxia
Costumer Name 4 is shenhua

　　另一种读取数组的方法：

<?
echo "3 of my customer are: ＄customer[0], " . " ＄customer[1] and " . " ＄customer[2]. " . "
";
?>

将会显示：
3 of my customer are: webjx, web and mutou.

　　十六.统计某个目录下文件的数量：

<?
echo("There is ");
＄dir = "/path/to/the/folder/in/your/computer ";
＄count = 0;
＄handle=opendir(＄dir);
while ((＄file = readdir(＄handle))!== false){ if (＄file != "." && ＄file != "..") { ＄count++; }}
echo ＄count;

echo(" Pages For You To Search In This Directory.");
?>

　　十七.显示当前日期或最新更新的日期：

<?php echo date("F d Y"); ?>

显示更新日期：

<?php echo "Last Modified: " . date ("m/d/y.", getlastmod());?>

　　十八.重复一个字符多次的代码：



<?
echo str_repeat("-", 30);
?>