分类分类
2015-06-28 00:00作者：网管联盟
这是一些使用频率比较高的函数，有的来自别人的程序......
1.产生随机字符串函数
function random($length) {
$hash = '';
$chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789abcdefghijklmnopqrstuvwxyz';
$max = strlen($chars) - 1;
mt_srand((double)microtime() * 1000000);
for($i = 0; $i < $length; $i++) {
$hash .= $chars[mt_rand(0, $max)];
}
return $hash;
}
2.截取一定长度的字符串
注：该函数对GB2312使用有效
function wordscut($string, $length ,$sss=0) {
if(strlen($string) > $length) {
if($sss){
$length=$length - 3;
$addstr=' ...';
}
for($i = 0; $i < $length; $i++) {
if(ord($string[$i]) > 127) {
$wordscut .= $string[$i].$string[$i + 1];
$i++;
} else {
$wordscut .= $string[$i];
}
}
return $wordscut.$addstr;
}
return $string;
}
3.取得客户端IP地址
function GetIP(){
if (getenv(&HTTP_CLIENT_IP&) && strcasecmp(getenv(&HTTP_CLIENT_IP&), &unknown&))
$ip = getenv(&HTTP_CLIENT_IP&);
else if (getenv(&HTTP_X_FORWARDED_FOR&) && strcasecmp(getenv(&HTTP_X_FORWARDED_FOR&), &unknown&))
$ip = getenv(&HTTP_X_FORWARDED_FOR&);
else if (getenv(&REMOTE_ADDR&) && strcasecmp(getenv(&REMOTE_ADDR&), &unknown&))
$ip = getenv(&REMOTE_ADDR&);
else if (isset($_SERVER['REMOTE_ADDR']) && $_SERVER['REMOTE_ADDR'] && strcasecmp($_SERVER['REMOTE_ADDR'], &unknown&))
$ip = $_SERVER['REMOTE_ADDR'];
else
$ip = &unknown&;
return($ip);
}
4.创建相应的文件夹
function createdir($dir='')
{
if (!is_dir($dir))
{
$temp = explode('/',$dir);
$cur_dir = '';
for($i=0;$i<count($temp);$i++)
{
$cur_dir .= $temp[$i].'/';
if (!is_dir($cur_dir))
{
@mkdir($cur_dir,0777);
}
}
}
}
5.判断邮箱地址
function checkEmail($inAddress)
{
return (ereg(&^([a-zA-Z0-9_-])+@([a-zA-Z0-9_-])+(.[a-zA-Z0-9_-])+&,$inAddress));
}
6.跳转
function gotourl($message='',$url='',$title='')
{
$html =&<html><head>&;
if(!empty($url))
$html .=&<meta http-equiv='refresh' content=&3;url='&.$url.&'&>&;
$html .=&<link href='../templates/style.css' type=text/css rel=stylesheet>&;
$html .=&</head><body><br><br><br><br>&;
$html .=&<table cellspacing='0' cellpadding='0' border='1' width='450' align='center'>&;
$html .=&<tr><td bgcolor='#ffffff'>&;
$html .=&<table border='1' cellspacing='1' cellpadding='4' width='100%'>&;
$html .=&<tr class='m_title'>&;
$html .=&<td>&.$title.&</td></tr>&;
$html .=&<tr class='line_1'><td align='center' height='60'>&;
$html .=&<br>&.$message.&<br><br>&;
if (!empty($url))
$html .=&系统将在3秒后返回<br>如果您的浏览器不能自动返回,请点击[<a href=&.$url.& target=_self>这里</a>]进入&;
else
$html .=&[<a href='#' onclick='history.go(-1)'>返回</a>]&;
$html .=&</td></tr></table></td></tr></table>&;
$html .=&</body></html>&;
echo $html;
exit;
}
7.分页（两个函数配合使用）
function getpage($sql,$page_size=20)
{
global $page,$totalpage,$sums; //out param
$page = $_GET[&page&];
//$eachpage = $page_size;
$pagesql = strstr($sql,& from &);
$pagesql = &select count(*) as ids &.$pagesql;
$result = mysql_query($pagesql);
if($rs = mysql_fetch_array($result)) $sums = $rs[0];
$totalpage = ceil($sums/$page_size);
if((!$page)||($page<1)) $page=1;
$startpos = ($page-1)*$page_size;
$sql .=& limit $startpos,$page_size &;
return $sql;
}
function showbar($string=&&)
{
global $page,$totalpage;
$out=&共<font color='red'><b>&.$totalpage.&</b></font>页 &;
$linkNum =4;
$start = ($page-round($linkNum/2))>0 ? ($page-round($linkNum/2)) : &1&;
&
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