PHP跳转函数和一个通用的操作提示类的编写
PHP 跳转，即重定向浏览器到指定的 URL，是一个很常见的功能。这种功能也有一些细节性的要求，比如等待多少秒以后跳转，用不用JavaScript实现跳转，等等。下面的跳转方法考虑到很多，并参数化，可以用到具体的项目当中。
<?php
/**
* 重定向浏览器到指定的 URL
*
* @param string $url 要重定向的 url
* @param int $delay 等待多少秒以后跳转
* @param bool $js 指示是否返回用于跳转的 JavaScript 代码
* @param bool $jsWrapped 指示返回 JavaScript 代码时是否使用 <mce:script type="text/javascript"><!--
标签进行包装
* @param bool $return 指示是否返回生成的 JavaScript 代码
*/
function redirect($url, $delay = 0, $js = false, $jsWrapped = true, $return = false)
{
$delay = (int)$delay;
if (!$js) {
if (headers_sent() || $delay > 0) {
echo <<<EOT
<html>
<head>
<meta http-equiv="refresh" content="{$delay};URL={$url}" />
</head>
</html>
EOT;
exit;
} else {
header("Location: {$url}");
exit;
}
}
$out = '';
if ($jsWrapped) {
$out .= '<script language="JavaScript" type="text/javascript">';
}
$url = rawurlencode($url);
if ($delay > 0) {
$out .= "window.setTimeOut(function () { document.location='{$url}'; }, {$delay});";
} else {
$out .= "document.location='{$url}';";
}
if ($jsWrapped) {
$out .= '
// --></mce:script>';
}
if ($return) {
return $out;
}
echo $out;
exit;
}
?>
一个通用的操作提示类的编写
在设计一些系统的时候，经常需要给用户进行操作提示。这种提示很重要，友好的提示能够提升用户对系统的好感度。操作提示有很多设计，下面是我的一个简陋的方案，仅抛砖引玉。
<?php
class Tips{
private $tips;
static private $_instance;
private function __construct($string, $url)
{
$this->tips = "
<meta http-equiv=refresh content=4;url=$url>
<p style='border:1px solid #B4D8F4; width:320px; height:120px; margin:0 auto; font-size:12px;'>
<p style='background-color:#CDE6F9; height:20px;'></p>
<p align='center' style='font-size:14px; font-weight:bold; margin:20px 0 20px 0;'>$string</p>
<p align='center'>返回 （4秒后自动返回）</p>
</p>
";
return $this->tips;
}
public function __toString(){
return $this->tips;
}
private function __clone(){}
public static function get_tips($string, $url)
{
if( FALSE == (self::$_instance instanceof self) )
{
self::$_instance = new self($string, $url);
}
return self::$_instance;
}
}
?>这个类功能很简单，就是实现了4秒后跳转到某个链接，或者点击跳到那个链接。
__toString()这个函数很重要，它可以实现类对象的字符串输出。
如何使用这个类呢？
include_once("./tips_class.php");
$hit = "错误：两次输入的密码不一致";
$jump = "../login.php";
echo $tips = Tips::get_tips($hit, $jump);
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