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Check Url
Wednesday, June 11th, 2008
<?php
$old_url = $_SERVER["REQUEST_URI"];
//检查链接中是否存在 ?
$check = strpos($old_url, ‘?’);
//如果存在 ?
if($check !== false){
//如果 ? 后面没有参数，如 http://www.yitu.org/index.php?
if(substr($old_url, $check+1) == ”){
//可以直接加上附加参数
$new_url = $old_url;
}
else //如果有参数，如：http://www.yitu.org/index.php?ID=12
{
$new_url = $old_url.’&’;
}
}else //如果不存在 ?
{
$new_url = $old_url.’?';
}
echo $new_url;
?>
详情见http://www.codebit.cn/pub/html/php_mysql/tip/other/check_url_parameter/
Rand() for images
Tuesday, June 3rd, 2008
<?php
echo rand(0, 5);
?>
rand这玩意可以用来生成指定范围内的随机数or字符，于是可以拿来做随机展示图片
<?php
$domain = ‘http://www.fouland.com/’;
echo $domain;
echo ‘<img src="’ . $domain . ‘/Path/currentName’ . rand(0, 5) . ‘.gif"’;
?>