PHP高手经验总结

header("Location: index.php");

方法二：

echo "";

方法三：

echo "";

2、获取访问者浏览器

function browse_infor() { 
$browser="";$browserver=""; 
$Browsers =array("Lynx","MOSAIC","AOL","Opera","JAVA","MacWeb","WebExplorer","OmniWeb");
$Agent = $GLOBALS["HTTP_USER_AGENT"]; 
for ($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

3、获取访问者操作系统

function osinfo() { 
$os=""; 
$Agent = $GLOBALS["HTTP_USER_AGENT"]; 
if (eregi(&＃39;win&＃39;,$Agent) && strpos($Agent, &＃39;95&＃39;)) { 
$os="Windows 95"; 
} 
elseif (eregi(&＃39;win 9x&＃39;,$Agent) && strpos($Agent, &＃39;4.90&＃39;)) { 
$os="Windows ME"; 
} 
elseif (eregi(&＃39;win&＃39;,$Agent) && ereg(&＃39;98&＃39;,$Agent)) { 
$os="Windows 98"; 
} 
elseif (eregi(&＃39;win&＃39;,$Agent) && eregi(&＃39;nt 5\.0&＃39;,$Agent)) { 
$os="Windows 2000"; 
} 
elseif (eregi(&＃39;win&＃39;,$Agent) && eregi(&＃39;nt&＃39;,$Agent)) { 
$os="Windows NT"; 
} 
elseif (eregi(&＃39;win&＃39;,$Agent) && eregi(&＃39;nt 5\.1&＃39;,$Agent)) { 
$os="Windows XP"; 
} 
elseif (eregi(&＃39;win&＃39;,$Agent) && ereg(&＃39;32&＃39;,$Agent)) { 
$os="Windows 32"; 
} 
elseif (eregi(&＃39;linux&＃39;,$Agent)) { 
$os="Linux\"; 
} 
elseif (eregi(&＃39;unix&＃39;,$Agent)) { 
$os="Unix"; 
} 
elseif (eregi(&＃39;sun&＃39;,$Agent) && eregi(&＃39;os&＃39;,$Agent)) { 
$os="SunOS"; 
} 
elseif (eregi(&＃39;ibm&＃39;,$Agent) && eregi(&＃39;os&＃39;,$Agent)) { 
$os="IBM OS/2"; 
} 
elseif (eregi(&＃39;Mac&＃39;,$Agent) && eregi(&＃39;PC&＃39;,$Agent)) { 
$os="Macintosh"; 
} 
elseif (eregi(&＃39;PowerPC&＃39;,$Agent)) { 
$os="PowerPC"; 
} 
elseif (eregi(&＃39;AIX&＃39;,$Agent)) { 
$os="AIX"; 
} 
elseif (eregi(&＃39;HPUX&＃39;,$Agent)) { 
$os="HPUX"; 
} 
elseif (eregi(&＃39;NetBSD&＃39;,$Agent)) { 
$os="NetBSD"; 
} 
elseif (eregi(&＃39;BSD&＃39;,$Agent)) { 
$os="BSD"; 
} 
elseif (ereg(&＃39;OSF1&＃39;,$Agent)) { 
$os="OSF1"; 
} 
elseif (ereg(&＃39;IRIX&＃39;,$Agent)) { 
$os="IRIX"; 
} 
elseif (eregi(&＃39;FreeBSD&＃39;,$Agent)) { 
$os="FreeBSD\"; 
} 
if ($os==&＃39;&＃39;) $os = "Unknown"; 
return $os; 
} 
//调用方法$os=os_infor() ;

4、文件格式类

$mime_types = array( 
&＃39;gif&＃39; => &＃39;image/gif&＃39;, 
&＃39;jpg&＃39; => &＃39;image/jpeg&＃39;, 
&＃39;jpeg&＃39; => &＃39;image/jpeg&＃39;, 
&＃39;jpe&＃39; => &＃39;image/jpeg&＃39;, 
&＃39;bmp&＃39; => &＃39;image/bmp&＃39;, 
&＃39;png&＃39; => &＃39;image/png&＃39;, 
&＃39;tif&＃39; => &＃39;image/tiff&＃39;, 
&＃39;tiff&＃39; => &＃39;image/tiff&＃39;, 
&＃39;pict&＃39; => &＃39;image/x-pict&＃39;, 
&＃39;pic&＃39; => &＃39;image/x-pict&＃39;, 
&＃39;pct&＃39; => &＃39;image/x-pict&＃39;, 
&＃39;tif&＃39; => &＃39;image/tiff&＃39;, 
&＃39;tiff&＃39; => &＃39;image/tiff&＃39;, 
&＃39;psd&＃39; => &＃39;image/x-photoshop&＃39;, 
&＃39;swf&＃39; => &＃39;application/x-shockwave-flash&＃39;, 
&＃39;js&＃39; => &＃39;application/x-Javascript&＃39;, 
&＃39;pdf&＃39; => &＃39;application/pdf&＃39;, 
&＃39;ps&＃39; => &＃39;application/postscript&＃39;, 
&＃39;eps&＃39; => &＃39;application/postscript&＃39;, 
&＃39;ai&＃39; => &＃39;application/postscript&＃39;, 
&＃39;wmf&＃39; => &＃39;application/x-msmetafile&＃39;, 
&＃39;css&＃39; => &＃39;text/css&＃39;, 
&＃39;htm&＃39; => &＃39;text/html&＃39;, 
&＃39;html&＃39; => &＃39;text/html&＃39;, 
&＃39;txt&＃39; => &＃39;text/plain&＃39;, 
&＃39;xml&＃39; => &＃39;text/xml&＃39;, 
&＃39;wml&＃39; => &＃39;text/wml&＃39;, 
&＃39;wbmp&＃39; => &＃39;image/vnd.wap.wbmp&＃39;, 
&＃39;mid&＃39; => &＃39;audio/midi&＃39;, 
&＃39;wav&＃39; => &＃39;audio/wav&＃39;, 
&＃39;mp3&＃39; => &＃39;audio/mpeg&＃39;, 
&＃39;mp2&＃39; => &＃39;audio/mpeg&＃39;, 
&＃39;avi&＃39; => &＃39;video/x-msvideo&＃39;, 
&＃39;mpeg&＃39; => &＃39;video/mpeg&＃39;, 
&＃39;mpg&＃39; => &＃39;video/mpeg&＃39;, 
&＃39;qt&＃39; => &＃39;video/quicktime&＃39;, 
&＃39;mov&＃39; => &＃39;video/quicktime&＃39;, 
&＃39;lha&＃39; => &＃39;application/x-lha&＃39;, 
&＃39;lzh&＃39; => &＃39;application/x-lha&＃39;, 
&＃39;z&＃39; => &＃39;application/x-compress&＃39;, 
&＃39;gtar&＃39; => &＃39;application/x-gtar&＃39;, 
&＃39;gz&＃39; => &＃39;application/x-gzip&＃39;, 
&＃39;gzip&＃39; => &＃39;application/x-gzip&＃39;, 
&＃39;tgz&＃39; => &＃39;application/x-gzip&＃39;, 
&＃39;tar&＃39; => &＃39;application/x-tar&＃39;, 
&＃39;bz2&＃39; => &＃39;application/bzip2&＃39;, 
&＃39;zip&＃39; => &＃39;application/zip&＃39;, 
&＃39;arj&＃39; => &＃39;application/x-arj&＃39;, 
&＃39;rar&＃39; => &＃39;application/x-rar-compressed&＃39;, 
&＃39;hqx&＃39; => &＃39;application/mac-binhex40&＃39;, 
&＃39;sit&＃39; => &＃39;application/x-stuffit&＃39;, 
&＃39;bin&＃39; => &＃39;application/x-macbinary&＃39;, 
&＃39;uu&＃39; => &＃39;text/x-uuencode&＃39;, 
&＃39;uue&＃39; => &＃39;text/x-uuencode&＃39;, 
&＃39;latex&＃39;=> &＃39;application/x-latex&＃39;, 
&＃39;ltx&＃39; => &＃39;application/x-latex&＃39;, 
&＃39;tcl&＃39; => &＃39;application/x-tcl&＃39;, 
&＃39;pgp&＃39; => &＃39;application/pgp&＃39;, 
&＃39;asc&＃39; => &＃39;application/pgp&＃39;, 
&＃39;exe&＃39; => &＃39;application/x-msdownload&＃39;, 
&＃39;doc&＃39; => &＃39;application/msword&＃39;, 
&＃39;rtf&＃39; => &＃39;application/rtf&＃39;, 
&＃39;xls&＃39; => &＃39;application/vnd.ms-excel&＃39;, 
&＃39;ppt&＃39; => &＃39;application/vnd.ms-powerpoint&＃39;, 
&＃39;mdb&＃39; => &＃39;application/x-msaccess&＃39;, 
&＃39;wri&＃39; => &＃39;application/x-mswrite&＃39;, 
);

5、php生成excel文档

 
//改动相应文件头就可以输出.doc .xls等文件格式了

6、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：

//$db->rows[$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")?"":"";