PHP高手经验总结

最近刚刚完成手中的项目，比较闲。来这儿转转，把积累的一些技巧分享给大家！
1、关于PHP重定向
方法一：

header("Location: index.php");

方法二：

echo "<script>window.location =\"$PHP_SELF\";</script>";

方法三：

echo "<META HTTP-EQUIV=\"Refresh\" CONTENT=\"0; URL=index.php\">";

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 = $GLOBALS["HTTP_USER_AGENT"]; 
if (eregi('win',$Agent) && strpos($Agent, '95')) { 
$os="Windows 95"; 
} 
elseif (eregi('win 9x',$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)) { 
$os="Windows NT"; 
} 
elseif (eregi('win',$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)) { 
$os="IBM OS/2"; 
} 
elseif (eregi('Mac',$Agent) && eregi('PC',$Agent)) { 
$os="Macintosh"; 
} 
elseif (eregi('PowerPC',$Agent)) { 
$os="PowerPC"; 
} 
elseif (eregi('AIX',$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)) { 
$os="OSF1"; 
} 
elseif (ereg('IRIX',$Agent)) { 
$os="IRIX"; 
} 
elseif (eregi('FreeBSD',$Agent)) { 
$os="FreeBSD\"; 
} 
if ($os=='') $os = "Unknown"; 
return $os; 
} 
//调用方法$os=os_infor() ;

4、文件格式类

$mime_types = array( 
'gif' => '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-javascript', 
'pdf' => 'application/pdf', 
'ps' => 'application/postscript', 
'eps' => 'application/postscript', 
'ai' => 'application/postscript', 
'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', 
);

5、php生成excel文档

<? 
header("Content-type:application/vnd.ms-excel"); 
header("Content-Disposition:filename=test.xls"); 
echo "test1\t"; 
echo "test2\t\n"; 
echo "test1\t"; 
echo "test2\t\n"; 
echo "test1\t"; 
echo "test2\t\n"; 
echo "test1\t"; 
echo "test2\t\n"; 
echo "test1\t"; 
echo "test2\t\n"; 
echo "test1\t"; 
echo "test2\t\n"; 
?> 
//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?"<img src=&#39;../image/newinfor.gif&#39;>":"";

方法二：

$newTag=$db->rows[$i][date]>=date("Y-m-d 00:00:00")?"<img src=&#39;../image/newinfor.gif&#39;>":"";