//OsPHP.COM.CN
return checkdate($dateArr[1],$dateArr[2],$dateArr[0]);
}
return false;
}
function check_time($time) { //检查时间是否合法时间
$timeArr = explode(“:”, $time);
if (is_numeric($timeArr[0]) && is_numeric($timeArr[1]) && is_numeric($timeArr[2])) {
if (($timeArr[0] >= 0 && $timeArr[0] <= 23) && ($timeArr[1] >= 0 && $timeArr[1] <= 59) && ($timeArr[2] >= 0 && $timeArr[2] <= 59))
return true;
else
return false;
}
return false;
}
function DateDiff($date1, $date2, $unit = "") { //时间比较函数，返回两个日期相差几秒、几分钟、几小时或几天
switch ($unit) {
case 's':
$dividend = 1;
break;
case 'i':
$dividend = 60;
break;
case 'h':
$dividend = 3600;
break;
case 'd':
$dividend = 86400;
break; //oSPHP.COM.CN
default:
$dividend = 86400;
}
$time1 = strtotime($date1);
$time2 = strtotime($date2);
if ($time1 && $time2)
return (float)($time1 – $time2) / $dividend;
return false;
}
?>
PHP重定向
window.location =”$PHP_SELF”;“;
方法三：echo ““;
?>
获取访问者浏览器
//开源OSPhP.COM.CN
{
if (strpos($Agent,$Browsers[$i]))
{
$browser = $Browsers[$i];
$browserver =””;
}
}
if (ereg(“Mozilla”,$Agent) && !ereg(“MSIE”,$Agent)) //OSPHP.COm.CN
{
$temp =explode(“(“, $Agent); $Part=$temp[0];
$temp =explode(“/”, $Part); $browserver=$temp[1];
$temp =explode(” “,$browserver); $browserver=$temp[0];
$browserver =preg_replace(“/([d.]+)/”,”1″,$browserver);
$browserver = ” $browserver”; //开源代码OSPhP.COm.CN
$browser = “Netscape Navigator”;
}
if (ereg(“Mozilla”,$Agent) && ereg(“Opera”,$Agent))
{
$temp =explode(“(“, $Agent); $Part=$temp[1];
$temp =explode(“)”, $Part); $browserver=$temp[1];
$temp =explode(” “,$browserver);$browserver=$temp[2];
$browserver =preg_replace(“/([d.]+)/”,”1″,$browserver);
$browserver = ” $browserver”;
$browser = “Opera”;
}
if (ereg(“Mozilla”,$Agent) && ereg(“MSIE”,$Agent))
{
$temp = explode(“(“, $Agent); $Part=$temp[1];
$temp = explode(“;”,$Part); $Part=$temp[1];
$temp = explode(” “,$Part);$browserver=$temp[2];
$browserver =preg_replace(“/([d.]+)/”,”1″,$browserver);
$browserver = ” $browserver”;
$browser = “Internet Explorer”;
}
if ($browser!=””)
{
$browseinfo = “$browser$browserver”;
}
else
{
$browseinfo = “Unknown”;
}
return $browseinfo;
}
//调用方法$browser=browseinfo() ;直接返回结果
?> //oS
获取访问者操作系统
//OsPHP.COM.CN
$os=”Windows 95″;
}
elseif (eregi(‘win 9x’,$Agent) && strpos($Agent, ‘4.90’)) {
$os=”Windows ME”;
}
elseif (eregi(‘win’,$Agent) && ereg(’98’,$Agent)) {
$os=”Windows 98″;
}
elseif (eregi(‘win’,$Agent) && eregi(‘nt 5.0’,$Agent)) {
$os=”Windows 2000″;
}
elseif (eregi(‘win’,$Agent) && eregi(‘nt’,$Agent)) { //oSPHP.COM.CN
$os=”Windows NT”;
}
elseif (eregi(‘win’,$Agent) && eregi(‘nt 5.1’,$Agent)) {
$os=”Windows XP”;
}
elseif (eregi(‘win’,$Agent) && ereg(’32’,$Agent)) {
$os=”Windows 32″;
}
elseif (eregi(‘linux’,$Agent)) {
$os=”Linux”;
}
elseif (eregi(‘unix’,$Agent)) {
$os=”Unix”;
}
elseif (eregi(‘sun’,$Agent) && eregi(‘os’,$Agent)) {
$os=”SunOS”;
}
elseif (eregi(‘ibm’,$Agent) && eregi(‘os’,$Agent)) { //OSPHP.COm.CN
$os=”IBM OS/2″;
}
elseif (eregi(‘Mac’,$Agent) && eregi(‘PC’,$Agent)) {
$os=”Macintosh”;
}
elseif (eregi(‘PowerPC’,$Agent)) { //开源OSPhP.COM.CN
$os=”PowerPC”;
}
elseif (eregi(‘AIX’,$Agent)) {
$os=”AIX”;
}
elseif (eregi(‘HPUX’,$Agent)) {
$os=”HPUX”;
}
elseif (eregi(‘NetBSD’,$Agent)) {
$os=”NetBSD”;
}
elseif (eregi(‘BSD’,$Agent)) {
$os=”BSD”;
}
elseif (ereg(‘OSF1’,$Agent)) { //PHP开源代码
$os=”OSF1″;
}
elseif (ereg(‘IRIX’,$Agent)) {
$os=”IRIX”;
}
elseif (eregi(‘FreeBSD’,$Agent)) {
$os=”FreeBSD”;
}
if ($os==”) $os = “Unknown”;
return $os;
}
//调用方法$os=os_infor() ;
?>
文件格式类
‘image/gif’,
‘jpg’ => ‘image/jpeg’,
‘jpeg’ => ‘image/jpeg’,
‘jpe’ => ‘image/jpeg’,
‘bmp’ => ‘image/bmp’,
‘png’ => ‘image/png’,
‘tif’ => ‘image/tiff’,
‘tiff’ => ‘image/tiff’,
‘pict’ => ‘image/x-pict’,
‘pic’ => ‘image/x-pict’,
‘pct’ => ‘image/x-pict’,
‘tif’ => ‘image/tiff’,
‘tiff’ => ‘image/tiff’,
‘psd’ => ‘image/x-photoshop’,
‘swf’ => ‘application/x-shockwave-flash’,
‘js’ => ‘application/x-javascrīpt’,
‘pdf’ => ‘application/pdf’,
‘ps’ => ‘application/postscrīpt’,
‘eps’ => ‘application/postscrīpt’,
‘ai’ => ‘application/postscrīpt’,
‘wmf’ => ‘application/x-msmetafile’,
‘css’ => ‘text/css’,
‘htm’ => ‘text/html’,
‘html’ => ‘text/html’,
‘txt’ => ‘text/plain’,
‘xml’ => ‘text/xml’,
‘wml’ => ‘text/wml’,
‘wbmp’ => ‘image/vnd.wap.wbmp’,
‘mid’ => ‘audio/midi’,
‘wav’ => ‘audio/wav’,
‘mp3’ => ‘audio/mpeg’,
‘mp2’ => ‘audio/mpeg’,
‘avi’ => ‘video/x-msvideo’,
‘mpeg’ => ‘video/mpeg’,
‘mpg’ => ‘video/mpeg’,
‘qt’ => ‘video/quicktime’,
‘mov’ => ‘video/quicktime’,
‘lha’ => ‘application/x-lha’,
‘lzh’ => ‘application/x-lha’,
‘z’ => ‘application/x-compress’,
‘gtar’ => ‘application/x-gtar’,
‘gz’ => ‘application/x-gzip’,
‘gzip’ => ‘application/x-gzip’,
‘tgz’ => ‘application/x-gzip’,
‘tar’ => ‘application/x-tar’,
‘bz2’ => ‘application/bzip2’,
‘zip’ => ‘application/zip’,
‘arj’ => ‘application/x-arj’,
‘rar’ => ‘application/x-rar-compressed’,
‘hqx’ => ‘application/mac-binhex40’,
‘sit’ => ‘application/x-stuffit’,
‘bin’ => ‘application/x-macbinary’,
‘uu’ => ‘text/x-uuencode’,
‘uue’ => ‘text/x-uuencode’,
‘latex’=> ‘application/x-latex’, //开源OSPhP.COM.CN
‘ltx’ => ‘application/x-latex’,
‘tcl’ => ‘application/x-tcl’,
‘pgp’ => ‘application/pgp’,
‘asc’ => ‘application/pgp’,
‘exe’ => ‘application/x-msdownload’,
‘doc’ => ‘application/msword’,
‘rtf’ => ‘application/rtf’,
‘xls’ => ‘application/vnd.ms-excel’,
‘ppt’ => ‘application/vnd.ms-powerpoint’,
‘mdb’ => ‘application/x-msaccess’,
‘wri’ => ‘application/x-mswrite’,
);
?>
php生成excel文档
//开源OSPhP.COM.CN
echo “test2tn”;
echo “test1t”;
echo “test2tn”;
echo “test1t”;
echo “test2tn”;
echo “test1t”;
echo “test2tn”;
//改动相应文件头就可以输出.doc .xls等文件格式了
?>
时间比较问题
举一个简单例子说明:比如一个论坛对当天发表的贴子用new图片标记一下。
方法一：
rows[$i][date]中为数据库中datetime字段值.
$today=time();
$theDay=date(“Y-m-d H:i:s”,$today-24*3600);
$newTag=$db->rows[$i][date]>=$theDay?”“:””;
//方法二：
$newTag=$db->rows[$i][date]>=date(“Y-m-d 00:00:00″)?”“:””;
?>
/提取页面和浏览器提交的变量，作用相当于使PHP.INI开了全局变量 //OSPHP.com.CN
//读取文件函数
//写入文件函数
//页面快速转向
nn页面转向中….n”;
print “n”;
print “nn
n”;
print “nn”;
print “n”;
print ”
n”;
print ”
n”;
print ”
n”;
print ”
n”;
print ” n”;
print ” n”; //OSPHP.COm.CN
print ”
n”;
print ” 页面转向提示信息
n”;
print ”
n”;
print ”
n”;
print ” $info
n”;
print ”
n”;
print ”
n”;
print ” n”;
print ” 如果你的浏览器不支持自动跳转,请按这里
n”;
print ”
n”;
print ”
n”;
print ”
n”;
print ”
n”;
print ”
n”;
print ”
n”;
print ”
n”;
print “
n”;
print “n“;
exit;
?>
产生随机字符串函数
截取一定长度的字符串（该函数对GB2312使用有效）
$length) {
if($sss){
$length=$length – 3;
$addstr=@# …@#; //OsPHP.COM.CN
}
for($i = 0; $i < $length; $i++) {
if(ord($string[$i]) > 127) {
$wordscut .= $string[$i].$string[$i + 1]; //oSPHP.COM.CN
$i++;
} else {
$wordscut .= $string[$i];
}
}
return $wordscut.$addstr;
}
return $string;
}
?>
取得客户端IP地址
判断邮箱地址
分页（两个函数配合使用）
//OSPHP.COm.CN
$pagesql = “select count(*) as ids “.$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;
$out="共“.$totalpage.”页 “; //开源代码OSPHP.COM.Cn
$linkNum =4;
$start = ($page-round($linkNum/2))>0 ? ($page-round($linkNum/2)) : “1”; //oSPHP.COM.CN
$end = ($page+round($linkNum/2))<$totalpage ? ($page+round($linkNum/2)) : $totalpage;
$prestart=$start-1;
$nextend=$end+1;
if($page<>1)
$out .= “第一页 “;
if($start>1) //OSPHP.COm.CN
$out.=”..<< “;
for($t=$start;$t<=$end;$t++)
{
$out .= ($page==$t) ? "[“.$t.”] ” : “$t “; //OSPHP.COM.Cn开源
}
if($end<$totalpage)
$out.=">>..“;
if($page<>$totalpage)
$out .= ” 最后页“; //开源OSPhP.COM.CN
return $out;
}
?>
//获得当前的脚本网址
//OSPHP.COM.Cn开源
if(empty($_SERVER[“QUERY_STRING”])) $nowurl = $scriptName;
else $nowurl = $scriptName.”?”.$_SERVER[“QUERY_STRING”];
}
return $nowurl;
}
?>
/把全角数字转为半角数字
//去除HTML标记
“,”>”,$txt);
$txt = preg_replace(“/[rn]{1,}/isU”,”
rn”,$txt);
return $txt;
}
?>
/相对路径转化成绝对路径
//取得所有链接
“‘ ]+)[“|’]?s*[^>]*>([^>]+)/i’,$code,$arr);
return array(‘name’=>$arr[2],’url’=>$arr[1]);
}
?>
//HTML表格的每行转为CSV格式数组
]*?>’si”,'”‘,$table);
$table = str_replace(“
“,'”,’,$table);
$table = str_replace(“
“,”{tr}”,$table);
//去掉 HTML 标记
$table = preg_replace(“‘<[/!]*?[^<>]*?>’si”,””,$table);
//去掉空白字符
$table = preg_replace(“‘([rn])[s]+'”,””,$table);
$table = str_replace(” “,””,$table);
$table = str_replace(” “,””,$table);
$table = explode(“,{tr}”,$table);
array_pop($table);
return $table;
}
?>
//将HTML表格的每行每列转为数组，采集表格数据
]*?>’si”,””,$table);
$table = preg_replace(“‘]*?>’si”,””,$table);
$table = preg_replace(“‘]*?>’si”,””,$table);
$table = str_replace(“
“,”{tr}”,$table); //PHP开源代码
$table = str_replace(“
“,”{td}”,$table);
//去掉 HTML 标记
$table = preg_replace(“‘<[/!]*?[^<>]*?>’si”,””,$table);
//去掉空白字符
$table = preg_replace(“‘([rn])[s]+'”,””,$table);
$table = str_replace(” “,””,$table);
$table = str_replace(” “,””,$table);
$table = explode(‘{tr}’, $table);
array_pop($table); //OSPHP.COM.Cn开源
foreach ($table as $key=>$tr) {
$td = explode(‘{td}’, $tr);
array_pop($td);
$td_array[] = $td;
}
return $td_array;
}
?>
//返回字符串中的所有单词 $distinct=true 去除重复
//oSPHP.COM.CN
return $match[1];
}
?>
ZT:http://www.osphp.com.cn/read.php?entryid=323&page=1&part=3]]>
