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[PHP]經(jīng)常用到的實(shí)用函數(shù)集合第2/2頁(yè)

更新時(shí)間：2007年11月08日 21:17:53 作者：

4、文件格式類(lèi)
復(fù)制內(nèi)容到剪貼板代碼:
$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生成excel文檔

復(fù)制代碼代碼如下:

<?  
header("Content-type:application/vnd.ms-excel");  
header("Content-Disposition:filename=test.xls");  
echo "test1t";  
echo "test2tn";  
echo "test1t";  
echo "test2tn";  
echo "test1t";  
echo "test2tn";  
echo "test1t";  
echo "test2tn";  
echo "test1t";  
echo "test2tn";  
echo "test1t";  
echo "test2tn";  
?>  
//改動(dòng)相應(yīng)文件頭就可以輸出.doc .xls等文件格式了

6、時(shí)間比較問(wèn)題
舉一個(gè)簡(jiǎn)單例子說(shuō)明:比如一個(gè)論壇對(duì)當(dāng)天發(fā)表的貼子用new圖片標(biāo)記一下。
方法一：

復(fù)制代碼代碼如下:

//$db->rows[$i][date]中為數(shù)據(jù)庫(kù)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='../image/newinfor.gif'>":""; 

方法二：

復(fù)制代碼代碼如下:

$newTag=$db->rows[$i][date]>=date("Y-m-d 00:00:00")?"<img src='../image/newinfor.gif'>":"";  
//提取頁(yè)面和瀏覽器提交的變量，作用相當(dāng)于使PHP.INI開(kāi)了全局變量  
復(fù)制內(nèi)容到剪貼板代碼:  
@extract($_SERVER, EXTR_SKIP);  
@extract($_SESSION, EXTR_SKIP);  
@extract($_POST, EXTR_SKIP);  
@extract($_FILES, EXTR_SKIP);  
@extract($_GET, EXTR_SKIP);  
@extract($_ENV, EXTR_SKIP);  
//得到ip地址 
$ip=$_SERVER['REMOTE_ADDR']; 
$ip1 = getenv('HTTP_X_FORWARDED_FOR'); 
if (($ip1 != "") && ($ip1 != "unknown")) $ip=$ip1; 
//讀取文件函數(shù) 

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;
}
}
//寫(xiě)入文件函數(shù)
復(fù)制內(nèi)容到剪貼板代碼:

復(fù)制代碼代碼如下:

function writetofile($file_name,$data,$method="w") {  
$filenum=fopen($file_name,$method);  
flock($filenum,LOCK_EX);  
$file_data=fwrite($filenum,$data);  
fclose($filenum);  
return $file_data;  
}  
//頁(yè)面快速轉(zhuǎn)向  
復(fù)制內(nèi)容到剪貼板代碼:  
function turntopage($url="index.php",$info = "頁(yè)面轉(zhuǎn)向中...",$second=2){  
print "<html>n<head>n<title>頁(yè)面轉(zhuǎn)向中....</title>n";  
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 "</head>n<body>n";  
print "<table width="100%" border="0" align="center">n";  
print " <tr>n";  
print " <td height="200"> </td>n";  
print " </tr>n";  
print " <tr>n";  
print " <td align="center">n";  
print " <table width="60%" border="0" cellpadding="8" bgcolor="#AA9FFF">n";  
print " <tr>n";  
print " <td height="30" align="center">頁(yè)面轉(zhuǎn)向提示信息</td>n";  
print " </tr>n";  
print " <tr>n";  
print " <td align="center">$info</td>n";  
print " </tr>n";  
print " <tr>n";  
print " <td align="center">n";  
print " <a href="$url">如果你的瀏覽器不支持自動(dòng)跳轉(zhuǎn),請(qǐng)按這里</a></td>n";  
print " </tr>n";  
print " </tr>n";  
print " </table></td>n";  
print " </tr>n";  
print " <tr>n";  
print " <td height="200"> </td>n";  
print " </tr>n";  
print "</table>n";  
print "</body>n</html>";  
exit;