知识大全 PHP常用函数

Posted 2022-07-21 知

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　　<?php function 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; //OSPHP CN return date("Y m d" mktime( $dateArr[ ] + $value[ m ] $dateArr[ ] + $value[ d ] $dateArr[ ] + $value[ y ])); //OSPHP CN function GetWeekDay($date) //计算出给出的日期是星期几 $dateArr = explode(" " $date); return date("w" mktime( $dateArr[ ] $dateArr[ ] $dateArr[ ])); ?> <? function GetIP() //获取IP if ($_SERVER["HTTP_X_FORWARDED_FOR"]) $ip = $_SERVER["HTTP_X_FORWARDED_FOR"];

　　 else if ($_SERVER["HTTP_CLIENT_IP"]) $ip = $_SERVER["HTTP_CLIENT_IP"]; else if ($_SERVER["REMOTE_ADDR"]) $ip = $_SERVER["REMOTE_ADDR"]; 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 $ip; ?><? function check_date($date) //检查日期是否合法日期 $dateArr = explode(" " $date); if (is_numeric($dateArr[ ]) && is_numeric($dateArr[ ]) && is_numeric($dateArr[ ])) checkdate($dateArr[ ] $dateArr[ ] $dateArr[ ]); return false; function check_time($time) //检查时间是否合法时间 //开源OSPhP CN $timeArr = explode(":" $time); if (is_numeric($timeArr[ ]) && is_numeric($timeArr[ ]) && is_numeric($timeArr[ ])) $timeArr[ ] >= && $timeArr[ ] <= ) && ($timeArr[ ] >= && $timeArr[ ] <= ) && ($timeArr[ ] >= && $timeArr[ ] <= )) //开源OSPhP CN return true; else return false; return false; function DateDiff($date $date $unit = "") //时间比较函数返回两个日期相差几秒几分钟几小时或几天 //开源代码OSPhP CN switch ($unit) case s : $dividend = ; break; case i : $dividend = ; break; case h : $dividend = ; break; case d : $dividend = ; break; //oSPHP CN default: $dividend = ; $time = strtotime($date ); $time = strtotime($date ); if ($time && $time ) $time $time ) / $dividend; return false; ?> PHP重定向 <? 方法一 header("Location: index php"); 方法二 echo "<scrīpt>window location ="$PHP_SELF";</scrīpt>"; //PHP开源代码方法三 echo "<META HTTP EQUIV="Refresh" CONTENT=" ; URL=index php">"; ?> 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= ; $i<= ; $i++) //OsPHP CN if (strpos($Agent $Browsers[$i])) $browser = $Browsers[$i]; $browserver =""; if (ereg("Mozilla" $Agent) && !ereg("MSIE" $Agent)) $temp =explode("(" $Agent); $Part=$temp[ ]; $temp =explode("/" $Part); $browserver=$temp[ ]; $temp =explode(" " $browserver); $browserver=$temp[ ]; $browserver =preg_replace("/([d ]+)/" " " $browserver); $browserver = " $browserver"; //OSPHP Cn开源 $browser = "Netscape Navigator"; if (ereg("Mozilla" $Agent) && ereg("Opera" $Agent)) $temp =explode("(" $Agent); $Part=$temp[ ]; $temp =explode(")" $Part); $browserver=$temp[ ]; $temp =explode(" " $browserver);$browserver=$temp[ ]; $browserver =preg_replace("/([d ]+)/" " " $browserver); $browserver = " $browserver"; $browser = "Opera"; if (ereg("Mozilla" $Agent) && ereg("MSIE" $Agent)) //OSPHP CN $temp = explode("(" $Agent); $Part=$temp[ ]; $temp = explode(";" $Part); $Part=$temp[ ]; $temp = explode(" " $Part);$browserver=$temp[ ]; $browserver =preg_replace("/([d ]+)/" " " $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 ?> //oSPHP 获取访问者操作系统 <? function osinfo() $os=""; $Agent = $GLOBALS["HTTP_USER_AGENT"]; if (eregi( win $Agent) && strpos($Agent )) //PHP开源代码 $os="Windows "; elseif (eregi( win x $Agent) && strpos($Agent )) $os="Windows ME"; elseif (eregi( win $Agent) && ereg( $Agent)) //OSPHP CN $os="Windows "; elseif (eregi( win $Agent) && eregi( nt $Agent)) $os="Windows "; elseif (eregi( win $Agent) && eregi( nt $Agent)) //开源代码OSPHP Cn $os="Windows NT"; elseif (eregi( win $Agent) && eregi( nt $Agent)) $os="Windows XP"; elseif (eregi( win $Agent) && ereg( $Agent)) $os="Windows "; elseif (eregi( linux $Agent)) $os="Linux"; elseif (eregi( unix $Agent)) $os="Unix"; eregi( sun $Agent) && eregi( os $Agent)) $os="SunOS"; elseif (eregi( ibm $Agent) && eregi( os $Agent)) $os="IBM OS/ "; 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"; //PHP开源代码 elseif (eregi( NetBSD $Agent)) $os="NetBSD"; elseif (eregi( BSD $Agent)) $os="BSD"; elseif (ereg( OSF $Agent)) $os="OSF "; elseif (ereg( IRIX $Agent)) $os="IRIX"; elseif (eregi( FreeBSD $Agent)) $os="FreeBSD"; $os== ) $os = "Unknown"; return $os; //调用方法$os=os_infor() ; ?> 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 javascrīpt pdf => application/pdf ps => application/postscrīpt eps => application/postscrīpt ai => application/postscrīpt wmf => application/x msmetafile css => text/css => text/ => text/ txt => text/plain xml => text/xml wml => text/wml wbmp => image/vnd wap wbmp mid => audio/midi wav => audio/wav mp => audio/mpeg mp => audio/mpeg avi => video/x msvideo mpeg => video/mpeg mpg => video/mpeg qt => video/quicktime mov => video/quicktime //开源代码OSPHP Cn lha => application/x lha lzh => application/x lha z => application/x press gtar => application/x gtar gz => application/x gzip gzip => application/x gzip tgz => application/x gzip tar => application/x tar bz => application/bzip zip => application/zip arj => application/x arj rar => application/x rar pressed hqx => application/mac binhex sit => application/x stuffit bin => application/x macbinary uu => text/x uuencode uue => text/x uuencode latex => application/x latex //PHP开源代码 ltx => application/x latex tcl => application/x tcl pgp => application/pgp asc => application/pgp exe => application/x msdownload doc => application/msword //OSPHP CN rtf => application/rtf xls => application/vnd ms excel ppt => application/vnd ms powerpoint mdb => application/x msaccess wri => application/x mswrite ); ?>

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生成excel文档 <? header("Content type:application/vnd ms excel"); header("Content Disposition:filename=test xls"); echo "test t"; echo "test tn"; echo "test t"; echo "test tn"; echo "test t"; "test tn"; echo "test t"; echo "test tn"; echo "test t"; echo "test tn"; echo "test t"; echo "test tn"; //改动相应文件头就可以输出 doc xls等文件格式了 ?> 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 * ); $newTag=$db >rows[$i][date]>=$theDay?"<img src= /image/newinfor gif >":"";

//方法二 $newTag=$db >rows[$i][date]>=date("Y m d : : ")?"<img src= /image/newinfor gif >":""; ?> //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($_POST EXTR_SKIP); @extract($_FILES EXTR_SKIP); //OSPHP CN @extract($_GET EXTR_SKIP); @extract($_ENV EXTR_SKIP); ?> //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 $file_data; ?> //页面快速转向 <? function turntopage($url="index php" $info = "页面转向中 " $second= ) print "<>n<head>n<title>页面转向中 </title>n"; print "<meta equiv="refresh" content="$second;url=$url">n";

print "<style type="text/css">n<! n"; print "td font family: "Verdana" "Arial";font size: pxn"; print "A COLOR: # ; TEXT DECORATION: nonen"; print " >n</style>n"; print "</head>n<body>n"; print "<table border=" " align="center">n"; //PHP开源代码 print " <tr>n"; print " <td > </td>n"; print " </tr>n"; print " <tr>n"; print " <td align="center">n"; print " <table border=" " cellpadding=" " bgcolor="#AA FFF">n";

　　//PHP开源代码

print " <tr>n"; print " <td align="center">页面转向提示信息</td>n"; print " </tr>n"; print " <tr>n"; print " <td align="center">$info</td>n"; print " </tr>n"; print " <tr>n"; //开源OSPhP CN print " <td align="center">n"; print " <a href="$url">如果你的浏览器不支持自动跳转请按这里</a></td>n"; print " </tr>n"; print " </tr>n"; print " </table></td>n"; print " </tr>n"; print " <tr>n";

print " <td > </td>n"; print " </tr>n"; print "</table>n"; print "</body>n</>"; exit; ?> echo cha138/Article/program/PHP/201311/20995