function random($length) { $hash = ''; $chars = 'abcdefghijklmnopqrstuvwxyz0123456789abcdefghijklmnopqrstuvwxyz'; $max = strlen($chars) - 1; mt_srand((double)microtime() * 1000000); for($i = 0; $i
2.截取一定长度的字符串
注：该函数对gb2312使用有效
function wordscut($string, $length ,$sss=0) { if(strlen($string) > $length) { if($sss){ $length=$length - 3; $addstr=' ...'; } for($i = 0; $i 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);}
#p#
4.创建相应的文件夹
function createdir($dir=''){ if (!is_dir($dir)) { $temp = explode('/',$dir); $cur_dir = ''; for($i=0;$i
5.判断邮箱地址
function checkemail($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）
$totalpage = ceil($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; $end = ($page+round($linknum/2))＜$totalpage ?
($page+round($linknum/2)) : $totalpage; $prestart=$start-1; $nextend=$end+1; if($page＜＞1) $out .= ＜a href='?page=1&&.$string.'title=第一页＞第一页＜/a＞ ; if($start＞1) $out.=＜a href='?page=.$prestart.' title=＞..＜＜＜/a＞ ; for($t=$start;$t＜=$end;$t++) { $out .= ($page==$t) ? ＜font color='red'＞＜b＞[.$t.]＜/b＞
＜/font＞ : ＜a href='?page=$t&&.$string.'＞$t＜/a＞ ; } if($end＜$totalpage) $out.=＜a href='?page=.$nextend.&&.$string.' title=＞＞＞..＜/a＞; if($page＜＞$totalpage) $out .= ＜a href='?page=.$totalpage.&&.$string.'
title=最后页＞最后页＜/a＞; return $out;}?＞
http://www.bkjia.com/phpjc/446705.htmlwww.bkjia.comtruehttp://www.bkjia.com/phpjc/446705.htmltecharticle1.产生随机字符串函数 function random($length) { $hash = ''; $chars = 'abcdefghijklmnopqrstuvwxyz0123456789abcdefghijklmnopqrstuvwxyz'; $max = strlen($chars) - 1; mt_srand(...