Some of the experience accumulated in PHP

1, about PHP redirection

Code fragment
Method One: Header ("Location:index.php");
Method Two: echo "<script>window.location =" $PHP _self ";</script>";
Method Three: Echo "<meta http-equiv=" Refresh "content=" 0; Url=index.php ">";
2. Get Visitor Browser
Code fragment
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;
}
Call Method $browser=browseinfo (), return results directly
3. Get the visitor's operating system

Code fragment
function Osinfo () {
$os = "";
$Agent = $GLOBALS ["Http_user_agent"];

4. File Format class


Code fragment
$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 ',

Reading file functions

Code fragment
function ReadFromFile ($file _name) {
if (file_exists ($file _name)) {
$filenum =fopen ($file _name, "R");
Flock ($filenum, LOCK_EX);
$file _data=fread ($filenum, FileSize ($file _name));
Rewind ($filenum);
Fclose ($filenum);
return $file _data;
}
}
Write to a file function

Code fragment
function WriteToFile ($file _name, $data, $method = "W") {
$filenum =fopen ($file _name, $method);
Flock ($filenum, LOCK_EX);
$file _data=fwrite ($filenum, $data);
Fclose ($filenum);
return $file _data;
}
Page Quick Turn
Code fragment
function Turntopage ($url = "index.php", $info = "page shift ...", $second =2) {
Print "Print "<meta http-equiv=" Refresh "content=" $second; url= $url ">n";
Print "<style type=" text/css ">n<!--n";
Print "TD {Font-family:" Verdana "," Arial "; Font-size:12px}n";
Print "A {COLOR: #000000; Text-decoration:none}n ";
print "-->n</style>n";
print "Print "<table width=" 100% "border=" 0 "align=" center ">n";
print "<tr>n";
Print "<td height=" ">&nbsp;</td>n";
print "</tr>n";
print "<tr>n";
Print "&LT;TD align=" center ">n";
Print "<table width=" 60% "border=" 0 "cellpadding=" 8 "bgcolor=" #AA9FFF ">n";
print "<tr>n";
Print "<td height=" align= "Center" > page turn to hint information </td>n ";
print "</tr>n";
print "<tr>n";
Print "&LT;TD align=" center "> $info </td>n";
print "</tr>n";
print "<tr>n";
Print "&LT;TD align=" center ">n";
Print "<a href=" $url > if your browser does not support automatic jump, please click here </a></td>n ";
print "</tr>n";
print "</table></td>n";
print "</tr>n";
print "<tr>n";
Print "<td height=" ">&nbsp;</td>n";
print "</tr>n";
print "</table>n";
print "</body>nExit
}