PHP 常用到的函数
jopen
12年前
<?php //获得当前的脚本网址 function GetCurUrl() { 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"]; } } return $nowurl; } //将URL中的某参数设为某值 function url_set_value($url,$key,$value) { $a=explode('?',$url); $url_f=$a[0]; $query=$a[1]; parse_str($query,$arr); $arr[$key]=$value; return $url_f.'?'.http_build_query($arr); } //获取IP function GetIP() { 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 $ip; } //时间的增加（还可以改进成时分秒都可以增加，有时间再补上） function DateAdd($date, $int, $unit = "d") { $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] + $value['y'])); //oSPHP.COM.CN } //计算出给出的日期是星期几 function GetWeekDay($date) { $dateArr = explode("-", $date); return date("w", mktime(0,0,0,$dateArr[1],$dateArr[2],$dateArr[0])); } //检查日期是否合法日期 function check_date($date) { $dateArr = explode("-", $date); if (is_numeric($dateArr[0]) && is_numeric($dateArr[1]) && is_numeric($dateArr[2])) { return checkdate($dateArr[1],$dateArr[2],$dateArr[0]); } return false; } //检查时间是否合法时间 function check_time($time) { $timeArr = explode(":", $time); if (is_numeric($timeArr[0]) && is_numeric($timeArr[1]) && is_numeric($timeArr[2])) { if (($timeArr[0] >= 0 && $timeArr[0] <= 23) && ($timeArr[1] >= 0 && $timeArr[1] <= 59) && ($timeArr[2] >= 0 && $timeArr[2] <= 59)) return true; else return false; } return false; } //时间比较函数，返回两个日期相差几秒、几分钟、几小时或几天 function DateDiff($date1, $date2, $unit = "") { switch ($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 && $time2) //OSPHP.com.CN return (float)($time1 - $time2) / $dividend; return false; } //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=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 $browseinfo; } //调用方法$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)) { $os="Windows 98"; } elseif (eregi('win',$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)) { $os="IBM OS/2"; } elseif (eregi('Mac',$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 $os; } //调用方法$os=os_infor() ; //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="$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; } /** * 返回经addslashes处理过的字符串或数组 * @param $string 需要处理的字符串或数组 * @return mixed */ function new_addslashes($string){ if(!is_array($string)) return addslashes($string); foreach($string as $key => $val) $string[$key] = new_addslashes($val); return $string; } /** * 返回经stripslashes处理过的字符串或数组 * @param $string 需要处理的字符串或数组 * @return mixed */ function new_stripslashes($string) { if(!is_array($string)) return stripslashes($string); foreach($string as $key => $val) $string[$key] = new_stripslashes($val); return $string; } /** * 返回经addslashe处理过的字符串或数组 * @param $obj 需要处理的字符串或数组 * @return mixed */ function new_html_special_chars($string) { if(!is_array($string)) return htmlspecialchars($string); foreach($string as $key => $val) $string[$key] = new_html_special_chars($val); return $string; } /** * 安全过滤函数 * * @param $string * @return string */ function safe_replace($string) { $string = str_replace('%20','',$string); $string = str_replace('%27','',$string); $string = str_replace('%2527','',$string); $string = str_replace('*','',$string); $string = str_replace('"','"',$string); $string = str_replace("'",'',$string); $string = str_replace('"','',$string); $string = str_replace(';','',$string); $string = str_replace('<','<',$string); $string = str_replace('>','>',$string); $string = str_replace("{",'',$string); $string = str_replace('}','',$string); return $string; } /** * 过滤ASCII码从0-28的控制字符 * @return String */ function trim_unsafe_control_chars($str) { $rule = '/[' . chr ( 1 ) . '-' . chr ( 8 ) . chr ( 11 ) . '-' . chr ( 12 ) . chr ( 14 ) . '-' . chr ( 31 ) . ']*/'; return str_replace ( chr ( 0 ), '', preg_replace ( $rule, '', $str ) ); } /** * 格式化文本域内容 * * @param $string 文本域内容 * @return string */ function trim_textarea($string) { $string = nl2br ( str_replace ( ' ', ' ', $string ) ); return $string; } /** * 将文本格式成适合js输出的字符串 * @param string $string 需要处理的字符串 * @param intval $isjs 是否执行字符串格式化，默认为执行 * @return string 处理后的字符串 */ function format_js($string, $isjs = 1){ $string = addslashes(str_replace(array("\r", "\n"), array('', ''), $string)); return $isjs ? 'document.write("'.$string.'");' : $string; } /** * 转义 javascript 代码标记 * * @param $str * @return mixed */ function trim_script($str) { $str = preg_replace ( '/\<([\/]?)script([^\>]*?)\>/si', '<\\1script\\2>', $str ); $str = preg_replace ( '/\<([\/]?)iframe([^\>]*?)\>/si', '<\\1iframe\\2>', $str ); $str = preg_replace ( '/\<([\/]?)frame([^\>]*?)\>/si', '<\\1frame\\2>', $str ); $str = preg_replace ( '/]]\>/si', ']] >', $str ); return $str; } /** * 字符截取 支持UTF8/GBK * @param $string * @param $length * @param $dot */ function str_cut($string, $length, $dot = '...') { $strlen = strlen($string); if($strlen <= $length) return $string; $string = str_replace(array(' ',' ', '&', '"', ''', '“', '”', '—', '<', '>', '·', '…'), array('∵',' ', '&', '"', "'", '“', '”', '—', '<', '>', '·', '…'), $string); $strcut = ''; if(strtolower(CHARSET) == 'utf-8') { $length = intval($length-strlen($dot)-$length/3); $n = $tn = $noc = 0; while($n < strlen($string)) { $t = ord($string[$n]); if($t == 9 || $t == 10 || (32 <= $t && $t <= 126)) { $tn = 1; $n++; $noc++; } elseif(194 <= $t && $t <= 223) { $tn = 2; $n += 2; $noc += 2; } elseif(224 <= $t && $t <= 239) { $tn = 3; $n += 3; $noc += 2; } elseif(240 <= $t && $t <= 247) { $tn = 4; $n += 4; $noc += 2; } elseif(248 <= $t && $t <= 251) { $tn = 5; $n += 5; $noc += 2; } elseif($t == 252 || $t == 253) { $tn = 6; $n += 6; $noc += 2; } else { $n++; } if($noc >= $length) { break; } } if($noc > $length) { $n -= $tn; } $strcut = substr($string, 0, $n); $strcut = str_replace(array('∵', '&', '"', "'", '“', '”', '—', '<', '>', '·', '…'), array(' ', '&', '"', ''', '“', '”', '—', '<', '>', '·', '…'), $strcut); } else { $dotlen = strlen($dot); $maxi = $length - $dotlen - 1; $current_str = ''; $search_arr = array('&',' ', '"', "'", '“', '”', '—', '<', '>', '·', '…','∵'); $replace_arr = array('&',' ', '"', ''', '“', '”', '—', '<', '>', '·', '…',' '); $search_flip = array_flip($search_arr); for ($i = 0; $i < $maxi; $i++) { $current_str = ord($string[$i]) > 127 ? $string[$i].$string[++$i] : $string[$i]; if (in_array($current_str, $search_arr)) { $key = $search_flip[$current_str]; $current_str = str_replace($search_arr[$key], $replace_arr[$key], $current_str); } $strcut .= $current_str; } } return $strcut.$dot; } /** * 获取请求ip * * @return ip地址 */ function ip() { if(getenv('HTTP_CLIENT_IP') && strcasecmp(getenv('HTTP_CLIENT_IP'), 'unknown')) { $ip = getenv('HTTP_CLIENT_IP'); } elseif(getenv('HTTP_X_FORWARDED_FOR') && strcasecmp(getenv('HTTP_X_FORWARDED_FOR'), 'unknown')) { $ip = getenv('HTTP_X_FORWARDED_FOR'); } elseif(getenv('REMOTE_ADDR') && strcasecmp(getenv('REMOTE_ADDR'), 'unknown')) { $ip = getenv('REMOTE_ADDR'); } elseif(isset($_SERVER['REMOTE_ADDR']) && $_SERVER['REMOTE_ADDR'] && strcasecmp($_SERVER['REMOTE_ADDR'], 'unknown')) { $ip = $_SERVER['REMOTE_ADDR']; } return preg_match ( '/[\d\.]{7,15}/', $ip, $matches ) ? $matches [0] : ''; } /** * 程序执行时间 * * @returnint单位ms */ function execute_time() { $stime = explode ( ' ', SYS_START_TIME ); $etime = explode ( ' ', microtime () ); return number_format ( ($etime [1] + $etime [0] - $stime [1] - $stime [0]), 6 ); } /** * 产生随机字符串 * * @param int $length 输出长度 * @param string $chars 可选的 ，默认为 0123456789 * @return string 字符串 */ function random($length, $chars = '0123456789') { $hash = ''; $max = strlen($chars) - 1; for($i = 0; $i < $length; $i++) { $hash .= $chars[mt_rand(0, $max)]; } return $hash; } /** * 将字符串转换为数组 * * @paramstring$data字符串 * @returnarray返回数组格式，如果，data为空，则返回空数组 */ function string2array($data) { if($data == '') return array(); eval("\$array = $data;"); return $array; } /** * 将数组转换为字符串 * * @paramarray$data数组 * @parambool$isformdata如果为0，则不使用new_stripslashes处理，可选参数，默认为1 * @returnstring返回字符串，如果，data为空，则返回空 */ function array2string($data, $isformdata = 1) { if($data == '') return ''; if($isformdata) $data = new_stripslashes($data); return addslashes(var_export($data, TRUE)); } /** * 转换字节数为其他单位 * * * @paramstring$filesize字节大小 * @returnstring返回大小 */ function sizecount($filesize) { if ($filesize >= 1073741824) { $filesize = round($filesize / 1073741824 * 100) / 100 .' GB'; } elseif ($filesize >= 1048576) { $filesize = round($filesize / 1048576 * 100) / 100 .' MB'; } elseif($filesize >= 1024) { $filesize = round($filesize / 1024 * 100) / 100 . ' KB'; } else { $filesize = $filesize.' Bytes'; } return $filesize; } /** * 查询字符是否存在于某字符串 * * @param $haystack 字符串 * @param $needle 要查找的字符 * @return bool */ function str_exists($haystack, $needle) { return !(strpos($haystack, $needle) === FALSE); } /** * 取得文件扩展 * * @param $filename 文件名 * @return 扩展名 */ function fileext($filename) { return strtolower(trim(substr(strrchr($filename, '.'), 1, 10))); } /** * 生成sql语句，如果传入$in_cloumn 生成格式为 IN('a', 'b', 'c') * @param $data 条件数组或者字符串 * @param $front 连接符 * @param $in_column 字段名称 * @return string */ function to_sqls($data, $front = ' AND ', $in_column = false) { if($in_column && is_array($data)) { $ids = '\''.implode('\',\'', $data).'\''; $sql = "$in_column IN ($ids)"; return $sql; } else{ if ($front == '') { $front = ' AND '; } if(is_array($data) && count($data) > 0) { $sql = ''; foreach ($data as $key => $val) { $sql .= $sql ? " $front `$key` = '$val' " : " `$key` = '$val' "; } return $sql; } else{ return $data; } } } /** * 判断email格式是否正确 * @param $email */ function is_email($email) { return strlen($email) > 6 && preg_match("/^[\w\-\.]+@[\w\-\.]+(\.\w+)+$/", $email); } /** * 文件下载 * @param $filepath 文件路径 * @param $filename 文件名称 */ function file_down($filepath, $filename = '') { if(!$filename) $filename = basename($filepath); if(is_ie()) $filename = rawurlencode($filename); $filetype = fileext($filename); $filesize = sprintf("%u", filesize($filepath)); if(ob_get_length() !== false) @ob_end_clean(); header('Pragma: public'); header('Last-Modified: '.gmdate('D, d M Y H:i:s') . ' GMT'); header('Cache-Control: no-store, no-cache, must-revalidate'); header('Cache-Control: pre-check=0, post-check=0, max-age=0'); header('Content-Transfer-Encoding: binary'); header('Content-Encoding: none'); header('Content-type: '.$filetype); header('Content-Disposition: attachment; filename="'.$filename.'"'); header('Content-length: '.$filesize); readfile($filepath); exit; } /** * 判断字符串是否为utf8编码，英文和半角字符返回ture * @param $string * @return bool */ function is_utf8($string) { return preg_match('%^(?: [\x09\x0A\x0D\x20-\x7E] # ASCII | [\xC2-\xDF][\x80-\xBF] # non-overlong 2-byte | \xE0[\xA0-\xBF][\x80-\xBF] # excluding overlongs | [\xE1-\xEC\xEE\xEF][\x80-\xBF]{2} # straight 3-byte | \xED[\x80-\x9F][\x80-\xBF] # excluding surrogates | \xF0[\x90-\xBF][\x80-\xBF]{2} # planes 1-3 | [\xF1-\xF3][\x80-\xBF]{3} # planes 4-15 | \xF4[\x80-\x8F][\x80-\xBF]{2} # plane 16 )*$%xs', $string); } /** * 对用户的密码进行加密 * @param $password * @param $encrypt //传入加密串，在修改密码时做认证 * @return array/password */ function password($password, $encrypt='') { $pwd = array(); $pwd['encrypt'] = $encrypt ? $encrypt : create_randomstr(); $pwd['password'] = md5(md5(trim($password)).$pwd['encrypt']); return $encrypt ? $pwd['password'] : $pwd; } /** * 生成随机字符串 * @param string $lenth 长度 * @return string 字符串 */ function create_randomstr($lenth = 6) { return random($lenth, '123456789abcdefghijklmnpqrstuvwxyzABCDEFGHIJKLMNPQRSTUVWXYZ'); } /** * 检查密码长度是否符合规定 * * @param STRING $password * @return TRUE or FALSE */ function is_password($password) { $strlen = strlen($password); if($strlen >= 6 && $strlen <= 20) return true; return false; } /** * 检测输入中是否含有错误字符 * * @param char $string 要检查的字符串名称 * @return TRUE or FALSE */ function is_badword($string) { $badwords = array("\\",'&',' ',"'",'"','/','*',',','<','>',"\r","\t","\n","#"); foreach($badwords as $value){ if(strpos($string, $value) !== FALSE) { return TRUE; } } return FALSE; } /** * 检查用户名是否符合规定 * * @param STRING $username 要检查的用户名 * @return TRUE or FALSE */ function is_username($username) { $strlen = strlen($username); if(is_badword($username) || !preg_match("/^[a-zA-Z0-9_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]+$/", $username)){ return false; } elseif ( 20 <= $strlen || $strlen < 2 ) { return false; } return true; } /** * 检查id是否存在于数组中 * * @param $id * @param $ids * @param $s */ function check_in($id, $ids = '', $s = ',') { if(!$ids) return false; $ids = explode($s, $ids); return is_array($id) ? array_intersect($id, $ids) : in_array($id, $ids); } /** * 对数据进行编码转换 * @param array/string $data 数组 * @param string $input 需要转换的编码 * @param string $output 转换后的编码 */ function array_iconv($data, $input = 'gbk', $output = 'utf-8') { if (!is_array($data)) { return iconv($input, $output, $data); } else { foreach ($data as $key=>$val) { if(is_array($val)) { $data[$key] = array_iconv($val, $input, $output); } else { $data[$key] = iconv($input, $output, $val); } } return $data; } } ?>