Several PHP application tips _php Skills

1, about PHP redirection
1, about PHP redirection
Method One: Header ("Location:index.php");
Method Two: echo "<scrīpt>window.location =\" $PHP _self\ ";</scrīpt>";
Method Three: Echo "<meta http-equiv=\" refresh\ "content=\" 0; Url=index.php\ ">";

2. Get Visitor Browser
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
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 (' Win ', $Agent) && ereg (' Eregi ', $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 (' Win ', $Agent) && ereg (' Eregi ', $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;
}
Call Method $os=os_infor ();

4. File Format class
$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-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 ',
);
5. PHP generates Excel document
?
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";
?>
Change the file header to output the. doc. xls file format
6, Time comparison problem
Give a simple example to illustrate: for example, a forum on the day posted posts with new pictures marked.
Method One:
$db->rows[$i][date] is the value of the DateTime field in the database.
$today =time ();
$theDay =date ("y-m-d h:i:s", $today -24*3600);
$newTag = $db->rows[$i][date]>= $theDay? " ': "";
Method Two:
$newTag = $db->rows[$i][date]>=date ("y-m-d 00:00:00")?