PHP常用函数正规写法

<? 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']; 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; }

?>

<?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; return date('Y-m-d', mktime(0,0,0, $dateArr[1] + $value[’m’], $dateArr[2] + $value[’d’], $dateArr[0] + $value[’y’])); } function GetWeekDay($date) { //计算出给出的日期是星期几 $dateArr = explode('-', $date); return date('w', mktime(0,0,0,$dateArr[1],$dateArr[2],$dateArr[0])); //PHP开源代码 } ?>

<? function check_date($date) { //检查日期是否合法日期 $dateArr = explode('-', $date); if (is_numeric($dateArr[0]) && is_numeric($dateArr[1]) && is_numeric($dateArr[2])) { //OSPHP.COm.CN return checkdate($dateArr[1],$dateArr[2],$dateArr[0]); } return false; } function check_time($time) { //检查时间是否合法时间 $timeArr = explode(':', $time); if (is_numeric($timeArr[0]) && is_numeric($timeArr[1]) && is_numeric($timeArr[2])) { //开源代码OSPHP.COM.Cn if (($timeArr[0] >= 0 && $timeArr[0] <= 23) && ($timeArr[1] >= 0 && $timeArr[1] <= 59) && ($timeArr[2] >= 0 && $timeArr[2] <= 59)) return true; else return false; } return false; } function DateDiff($date1, $date2, $unit = '') { //时间比较函数，返回两个日期相差几秒、几分钟、几小时或几天 //开源代码OSPHP.COM.Cn switch ($unit) { case ’s’: $dividend = 1; break; case ’i’: $dividend = 60; break; case ’h’: $dividend = 3600; break; case ’d’: $dividend = 86400; break; default: $dividend = 86400; } $time1 = strtotime($date1); $time2 = strtotime($date2); if ($time1 && $time2) return (float)($time1 - $time2) / $dividend; return false; } ?>

PHP重定向 <? 方法一：header('Location: index.php'); 方法二：echo '<scrīpt>window.location ='$PHP_SELF';</scrīpt>'; 方法三：echo '<META HTTP-EQUIV='Refresh' CONTENT='0; URL=index.php'>'; ?>

获取访问者浏览器 <? function browse_infor() { $browser='';$browserver=''; //OSPHP.COM.Cn开源 $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)) //OSPHP.com.CN { $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]; //OsPHP.COM.CN $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 $browseinfo; } //调用方法$browser=browseinfo() ;直接返回结果 ?>

获取访问者操作系统 <? 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’)) { $os='Windows ME'; } elseif (eregi(’win’,$Agent) && ereg(’98’,$Agent)) { //开源代码OSPHP.COM.Cn $os='Windows 98'; } elseif (eregi(’win’,$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)) { $os='Windows XP'; } elseif (eregi(’win’,$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)) { //OsPHP.COM.CN $os='IBM OS/2'; } elseif (eregi(’Mac’,$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)) { $os='FreeBSD'; //OSPHP.COm.CN } if ($os==’’) $os = 'Unknown'; return $os; } //调用方法$os=os_infor() ; ?>

文件格式类 <? $mime_types = array( ’gif’ => ’image/gif’, //OsPHP.COM.CN ’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’, ); ?>

php生成excel文档 <? 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-24*3600); $newTag=$db->rows[$i][date]>=$theDay?'<img src=’../image/newinfor.gif’>':''; //方法二： $newTag=$db->rows[$i][date]>=date('Y-m-d 00:00:00')?'<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); @extract($_GET, EXTR_SKIP); @extract($_ENV, EXTR_SKIP); ?>

//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); fclose($filenum); return $file_data; } } ?>

//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...',$second=2){ print '<html>n<head>n<title>页面转向中....</title>n'; print '<meta http-equiv='refresh' content='$second;url=$url'>n'; print '<style type='text/css'>n<!--n'; print 'td { font-family: 'Verdana', 'Arial';font-size: 12px}n'; print 'A {COLOR: #000000; TEXT-DECORATION: none}n'; print '-->n</style>n'; print '</head>n<body>n'; print '<table width='100%' border='0' align='center'>n'; print ' <tr>n'; print ' <td height='200'> </td>n'; print ' </tr>n'; print ' <tr>n'; print ' <td align='center'>n'; print ' <table width='60%' border='0' cellpadding='8' bgcolor='#AA9FFF'>n'; print ' <tr>n'; print ' <td height='30' align='center'>页面转向提示信息</td>n'; print ' </tr>n'; print ' <tr>n'; print ' <td align='center'>$info</td>n'; print ' </tr>n'; print ' <tr>n'; print ' <td align='center'>n'; print ' <a href='https://www.haobala.com/bcjs/$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 height='200'> </td>n'; print ' </tr>n'; print '</table>n'; print '</body>n</html>'; exit; ?>

产生随机字符串函数 <? function random($length) { $hash = @#@#; $chars = @#ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789abcdefghijklmnopqrstuvwxyz@#; $max = strlen($chars) - 1; mt_srand((double)microtime() * 1000000); for($i = 0; $i < $length; $i++) { //开源代码OSPhP.COm.CN $hash .= $chars[mt_rand(0, $max)]; } return $hash; } ?>

取得客户端IP地址 <? //开源OSPhP.COM.CN function GetIP(){ if (getenv('HTTP_CLIENT_IP') && strcasecmp(getenv('HTTP_CLIENT_IP'), 'unknown')) $ip = getenv('HTTP_CLIENT_IP'); else if (getenv('HTTP_X_FORWARDED_FOR') && strcasecmp(getenv('HTTP_X_FORWARDED_FOR'), 'unknown')) $ip = getenv('HTTP_X_FORWARDED_FOR'); else if (getenv('REMOTE_ADDR') && strcasecmp(getenv('REMOTE_ADDR'), 'unknown')) $ip = getenv('REMOTE_ADDR'); else if (isset($_SERVER[@#REMOTE_ADDR@#]) && $_SERVER[@#REMOTE_ADDR@#] && strcasecmp($_SERVER[@#REMOTE_ADDR@#], 'unknown')) $ip = $_SERVER[@#REMOTE_ADDR@#]; else $ip = 'unknown'; return($ip); } ?>

判断邮箱地址 <? function checkEmail($inAddress) { return (ereg('^([a-zA-Z0-9_-])+@([a-zA-Z0-9_-])+(.[a-zA-Z0-9_-])+',$inAddress)); } ?>

分页（两个函数配合使用） <? function getpage($sql,$page_size=20) { global $page,$totalpage,$sums; //out param $page = $_GET['page']; //$eachpage = $page_size; $pagesql = strstr($sql,' from '); $pagesql = 'select count(*) as ids '.$pagesql; $result = mysql_query($pagesql); if($rs = mysql_fetch_array($result)) $sums = $rs[0]; $totalpage = ceil($sums/$page_size); if((!$page)($page<1)) $page=1; $startpos = ($page-1)*$page_size; $sql .=' limit $startpos,$page_size '; return $sql; } function showbar($string='') { global $page,$totalpage; $out='共<font '.$totalpage.'color=@#red@#><b>'.$totalpage.'</b></font>页 '; $linkNum =4; $start = ($page-round($linkNum/2))>0 ? ($page-round($linkNum/2)) : '1'; $end = ($page+round($linkNum/2))<$totalpage ? ($page+round($linkNum/2)) : $totalpage; $prestart=$start-1; $nextend=$end+1; if($page<>1) $out .= '<a href=@#?page=1&&'.$string.'@#title=第一页>第一页</a> '; if($start>1) //开源代码OSPhP.COm.CN $out.='<a href=@#?page='.$prestart.'@# title=上一页>..<<</a> '; for($t=$start;$t<=$end;$t++) { $out .= ($page==$t) ? '<font ['.$t.']color=@#red@#><b>['.$t.']</b></font> ' : '<a $thref=@#?page=$t&&'.$string.'@#>$t</a> '; } if($end<$totalpage) $out.='<a href=@#?page='.$nextend.'&&'.$string.'@# title=下一页>>>..</a>'; if($page<>$totalpage) $out .= ' <a href=@#?page='.$totalpage.'&&'.$string.'@# title=最后页>最后页</a>'; return $out; } ?>

//获得当前的脚本网址 <? function get_php_url(){ if(!empty($_server['REQUEST_URI'])){ $scriptName = $_SERVER['REQUEST_URI']; $nowurl = $scriptName; }else{ $scriptName = $_SERVER['PHP_SELF']; if(empty($_SERVER['QUERY_STRING'])) $nowurl = $scriptName; else $nowurl = $scriptName.'?'.$_SERVER['QUERY_STRING']; } //开源代码OSPHP.COM.Cn return $nowurl; } ?>

//把全角数字转为半角数字 <? function GetAlabNum($fnum){ $nums = array('０','１','２','３','４','５','６','７','８','９'); //OSPHP.com.CN $fnums = '0123456789'; for($i=0;$i<=9;$i++) $fnum = str_replace($nums[$i],$fnums[$i],$fnum); $fnum = ereg_replace('[^0-9.]|^0{1,}','',$fnum); if($fnum=='') $fnum=0; return $fnum; } ?>

//去除HTML标记 <? function Text2Html($txt){ $txt = str_replace(' ','　',$txt); $txt = str_replace('<','&lt;',$txt); $txt = str_replace('>','&gt;',$txt); $txt = preg_replace('/[rn]{1,}/isU',' rn',$txt); return $txt; } ?>

//相对路径转化成绝对路径 <? function relative_to_absolute($content, $feed_url) { preg_match(’/(http|https|ftp):///’, $feed_url, $protocol); $server_url = preg_replace('/(http|https|ftp|news):///', '', $feed_url); $server_url = preg_replace('//.*/', '', $server_url); if ($server_url == ’’) { return $content; } if (isset($protocol[0])) { $new_content = preg_replace(’/href='https://’, ’href='’.$protocol[0].$server_url.’/’, $content); $new_content = preg_replace(’/src='https://’, ’src='’.$protocol[0].$server_url.’/’, $new_content); } else { $new_content = $content; } return $new_content; } ?>

//HTML表格的每行转为CSV格式数组 <? function get_tr_array($table) { $table = preg_replace('’<td[^>]*?>’si',’'’,$table); $table = str_replace('</td>',’',’,$table); $table = str_replace('</tr>','{tr}',$table); //去掉 HTML 标记 $table = preg_replace('’<[/!]*?[^<>]*?>’si','',$table); //去掉空白字符 $table = preg_replace('’([rn])[s]+’','',$table); $table = str_replace(' ','',$table); $table = str_replace(' ','',$table); $table = explode(',{tr}',$table); //OSPHP.com.CN array_pop($table); return $table; } ?>

//将HTML表格的每行每列转为数组，采集表格数据 <? function get_td_array($table) { $table = preg_replace('’<table[^>]*?>’si','',$table); $table = preg_replace('’<tr[^>]*?>’si','',$table); $table = preg_replace('’<td[^>]*?>’si','',$table); $table = str_replace('</tr>','{tr}',$table); $table = str_replace('</td>','{td}',$table); //去掉 HTML 标记 $table = preg_replace('’<[/!]*?[^<>]*?>’si','',$table); //去掉空白字符 $table = preg_replace('’([rn])[s]+’','',$table); $table = str_replace(' ','',$table); $table = str_replace(' ','',$table); $table = explode(’{tr}’, $table); array_pop($table); foreach ($table as $key=>$tr) { $td = explode(’{td}’, $tr); array_pop($td); $td_array[] = $td; //开源代码OSPHP.COM.Cn } return $td_array; } ?>

//返回字符串中的所有单词 $distinct=true 去除重复 <? function split_en_str($str,$distinct=true) { preg_match_all(’/([a-zA-Z]+)/’,$str,$match); if ($distinct == true) { $match[1] = array_unique($match[1]); } sort($match[1]); //OsPHP.COM.CN return $match[1]; } ?>