?在线地址：https://www.doczj.com/doc/949057115.html,/read.php/323.htm
内容：
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= 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; default: $dividend = 86400; } $time1 = strtotime($date1); $time2 = strtotime($date2); if ($time1 && $time2) return (float)($time1 - $time2) / $dividend; return false;
} ?>
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PHP重定向
window.location ="$PHP_SELF";";
方法三：echo ""; ?>
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获取访问者浏览器
BALS["HTTP_USER_AGENT"];
for ($i=0; $i<=7; $i++)
{
if (strpos($Agent,$Browsers[$i]))
{
$browser = $Browsers[$i];
$browserver ="";
}
}
if (ereg("Mozilla",$Agent) && !ereg("MSIE",$Agent))
{
$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";
$browser = "Netscape Navigator";
}
if (ereg("Mozilla",$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 ?>
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获取访问者操作系统
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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',
'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',
); ?>
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php生成excel文档
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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[$i][date]>=date("Y-m-d 00:00:00")?"":""; ?>
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//提取页面和浏览器提交的变量，作用相当于使PHP.INI开了全局变量
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//读取文件函数
ame));
rewind($filenum);
fclose($filenum);
return $file_data;
}
} ?>
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//写入文件函数
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//页面快速转向
n
| n"; print " | |||
n";
print "
| n";
print " |||
| n"; print " |
MOTE_ADDR@#], "unknown")) $ip = $_SERVER[@#REMOTE_ADDR@#]; else $ip = "unknown"; return($ip);
} ?>
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判断邮箱地址
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分页（两个函数配合使用）
".$totalpage."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) $out .= "第一页 "; if($start>1)
$out.="..<< "; for($t=$start;$t<=$end;$t++) { $out .= ($page==$t) ? "[".$t."] " : "$t "; }
if($end<$totalpage)
$out.=">>.."; if($page<>$totalpage) $out .= " 最后页"; return $out;
} ?>
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获取新插入数据的ID
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//获得当前的脚本网址
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//把全角数字转为半角数字
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//去除HTML标记
",">",
$txt); $txt = preg_replace("/[rn]{1,}/isU","
rn",$txt); return $txt;
} ?>
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//相对路径转化成绝对路径
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//取得所有链接
"' ]+)["|']?s*[^>]*>([^>]+)/i',$code,$arr); return array('name'=>$arr[2],'url'=>$arr[1]); } ?>
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//HTML表格的每行转为CSV格式数组
]*?>'si",'"',$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 $table;
} ?>
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//将HTML表格的每行每列转为数组，采集表格数据
]*?>'si","",$table); $table = preg_replace("'
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//返回字符串中的所有单词 $distinct=true 去除重复
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//打印出为本PHP项目做出贡献的人
员的清单