php开发中常用函数总结.docx

1、php开发中常用函数总结php开发中常用函数总结 1.获取IP2.时间的增加3.检查日期是否合法日期4.时间比较函数，返回两个日期相差几秒、几分钟、几小时或几天5.PHP重定向6.获取访问者浏览器7.获取访问者操作系统8.文件格式类9.php生成excel文档10.时间比较问题11.提取页面和浏览器提交的变量，作用相当于使PHP.INI开了全局变量12.读取文件函数13.写入文件函数14.页面快速转向15.产生随机字符串函数16.截取一定长度的字符串（该函数对GB2312使用有效）17.取得客户端IP地址18.判断邮箱地址19.分页（两个函数配合使用）20.获取新插入数据的ID21.获得当前的

2、脚本网址22.把全角数字转为半角数字23.去除HTML标记24.相对路径转化成绝对路径26.取得所有链接27.HTML表格的每行转为CSV格式数组28.将HTML表格的每行每列转为数组，采集表格数据29.返回字符串中的所有单词 $distinct=true 去除重复30.打印出为本PHP项目做出贡献的人员的清单<? function GetIP() /获取IP if ($_SERVERHTTP_X_FORWARDED_FOR) $ip = $_SERVERHTTP_X_FORWARDED_FOR; else if ($_SERVERHTTP_CLIENT_IP) $ip = $_SERV

3、ERHTTP_CLIENT_IP; else if ($_SERVERREMOTE_ADDR) $ip = $_SERVERREMOTE_ADDR; else if (getenv(HTTP_X_FORWARDED_FOR) $ip = getenv(HTTP_X_FORWARDED_FOR); else if (getenv(HTTP_CLIENT_IP) $ip = getenv(HTTP_CLIENT_IP); else if (getenv(REMOTE_ADDR) $ip = getenv(REMOTE_ADDR); else $ip = Unknown; return $ip;?&

4、gt;downsource<?phpfunction DateAdd($date, $int, $unit = d) /时间的增加（还可以改进成时分秒都可以增加，有时间再补上） $dateArr = explode(-, $date); $value$unit = $int; return date(Y-m-d, mktime(0,0,0, $dateArr1 + $valuem, $dateArr2 + $valued, $dateArr0 + $valuey);function GetWeekDay($date) /计算出给出的日期是星期几 $dateArr = explode(-,

5、 $date); return date(w, mktime(0,0,0,$dateArr1,$dateArr2,$dateArr0);?>downsource<?function check_date($date) /检查日期是否合法日期 $dateArr = explode(-, $date); if (is_numeric($dateArr0) && is_numeric($dateArr1) && is_numeric($dateArr2) return checkdate($dateArr1,$dateArr2,$dateArr0); re

6、turn false;function check_time($time) /检查时间是否合法时间 $timeArr = explode(:, $time); if (is_numeric($timeArr0) && is_numeric($timeArr1) && is_numeric($timeArr2) if ($timeArr0 >= 0 && $timeArr0 <= 23) && ($timeArr1 >= 0 && $timeArr1 <= 59) && ($t

7、imeArr2 >= 0 && $timeArr2 <= 59) return true; else return false; return false;function DateDiff($date1, $date2, $unit = ) /时间比较函数，返回两个日期相差几秒、几分钟、几小时或几天 switch ($unit) case s: $dividend = 1; break; case i: $dividend = 60; break; case h: $dividend = 3600; break; case d: $dividend = 86400

8、; break; default: $dividend = 86400; $time1 = strtotime($date1); $time2 = strtotime($date2); if ($time1 && $time2) return (float)($time1 - $time2) / $dividend; return false;?>downsourcePHP重定向<?方法一：header(Location: index.php);方法二：echo <scrpt>window.location =$PHP_SELF;</scrpt&g

9、t;方法三：echo <META HTTP-EQUIV=Refresh CONTENT=0; URL=index.php>?>downsource获取访问者浏览器<?function browse_infor()$browser=;$browserver=;$Browsers =array(Lynx,MOSAIC,AOL,Opera,JAVA,MacWeb,WebExplorer,OmniWeb);$Agent = $GLOBALSHTTP_USER_AGENT;for ($i=0; $i<=7; $i+)if (strpos($Agent,$Browsers$i

10、)$browser = $Browsers$i;$browserver =;if (ereg(Mozilla,$Agent) && !ereg(MSIE,$Agent)$temp =explode(, $Agent); $Part=$temp0;$temp =explode(/, $Part); $browserver=$temp1;$temp =explode( ,$browserver); $browserver=$temp0;$browserver =preg_replace(/(d.+)/,1,$browserver);$browserver = $browserver

11、;$browser = Netscape Navigator;if (ereg(Mozilla,$Agent) && ereg(Opera,$Agent)$temp =explode(, $Agent); $Part=$temp1;$temp =explode(), $Part); $browserver=$temp1;$temp =explode( ,$browserver);$browserver=$temp2;$browserver =preg_replace(/(d.+)/,1,$browserver);$browserver = $browserver;$browse

12、r = Opera;if (ereg(Mozilla,$Agent) && ereg(MSIE,$Agent)$temp = explode(, $Agent); $Part=$temp1;$temp = explode(;,$Part); $Part=$temp1;$temp = explode( ,$Part);$browserver=$temp2;$browserver =preg_replace(/(d.+)/,1,$browserver);$browserver = $browserver;$browser = Internet Explorer;if ($brows

13、er!=)$browseinfo = $browser$browserver;else$browseinfo = Unknown;return $browseinfo;/调用方法$browser=browseinfo() ;直接返回结果?>downsource获取访问者操作系统<?function osinfo() $os=;$Agent = $GLOBALSHTTP_USER_AGENT;if (eregi(win,$Agent) && strpos($Agent, 95) $os=Windows 95;elseif (eregi(win 9x,$Agent) &

14、amp;& 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

15、(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 O

16、S/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

17、(ereg(IRIX,$Agent) $os=IRIX;elseif (eregi(FreeBSD,$Agent) $os=FreeBSD;if ($os=) $os = Unknown;return $os;/调用方法$os=os_infor() ;?>downsource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 =

18、> 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-javascrpt,pdf => application/pdf,ps => application/p

19、ostscrpt,eps => application/postscrpt,ai => application/postscrpt,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

20、 => 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-g

21、zip,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

22、/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 =

23、> application/vnd.ms-excel,ppt => application/vnd.ms-powerpoint,mdb => application/x-msaccess,wri => application/x-mswrite,);?>downsourcephp生成excel文档<?header(Content-type:application/vnd.ms-excel);header(Content-Disposition:filename=test.xls);echo test1t;echo test2tn;echo test1t;ec

24、ho test2tn;echo test1t;echo test2tn;echo test1t;echo test2tn;echo test1t;echo test2tn;echo test1t;echo test2tn;/改动相应文件头就可以输出.doc .xls等文件格式了?>downsource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：<?/$db->rows$idate中为数据库中datetime字段值.$today=time();$theDay=date(Y-m-d H:i:s,$today-24*3600);$new

25、Tag=$db->rows$idate>=$theDay?<img src=./image/newinfor.gif>:;/方法二：$newTag=$db->rows$idate>=date(Y-m-d 00:00:00)?<img src=./image/newinfor.gif>:;?>downsource/提取页面和浏览器提交的变量，作用相当于使PHP.INI开了全局变量<?extract($_SERVER, EXTR_SKIP);extract($_SESSION, EXTR_SKIP);extract($_POST, EXT

26、R_SKIP);extract($_FILES, EXTR_SKIP);extract($_GET, EXTR_SKIP);extract($_ENV, EXTR_SKIP);?>downsource/读取文件函数<?function readfromfile($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);fclos

27、e($filenum);return $file_data;?>downsource/写入文件函数<?function writetofile($file_name,$data,$method=w) $filenum=fopen($file_name,$method);flock($filenum,LOCK_EX);$file_data=fwrite($filenum,$data);fclose($filenum);return $file_data;?>downsource/页面快速转向<?function turntopage($url=index.php,$inf

28、o = 页面转向中.,$second=2)print <html>n<head>n<title>页面转向中.</title>n;print <meta http-equiv=refresh content=$second;url=$url>n;print <style type=text/css>n<!-n;print td font-family: Verdana, Arial;font-size: 12pxn;print A COLOR: #000000; TEXT-DECORATION: nonen;print

29、 ->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=#AA9F

30、FF>n;print <tr>n;print <td height=30 align=center>页面转向提示信息</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>如果你的浏览器不支持自动跳转,请按这里</a></td>n;print