代码如下：
<?php/** * 常用工具类 * author Lee. 艾妮 http://ini.iteye.com* Last modify $Date: 2012-8-23*/class Tool { /** * js 弹窗并且跳转 * @param string $_info * @param string $_url * @return js */ static public function alertLocation($_info, $_url) { echo "<script type='text/javascript'>alert('$_info');location.href='$_url';</script>"; exit(); } /** * js 弹窗返回 * @param string $_info * @return js */ static public function alertBack($_info) { echo "<script type='text/javascript'>alert('$_info');history.back();</script>"; exit(); } /** * 页面跳转 * @param string $url * @return js */ static public function headerUrl($url) { echo "<script type='text/javascript'>location.href='{$url}';</script>"; exit(); } /** * 弹窗关闭 * @param string $_info * @return js */ static public function alertClose($_info) { echo "<script type='text/javascript'>alert('$_info');close();</script>"; exit(); } /** * 弹窗 * @param string $_info * @return js */ static public function alert($_info) { echo "<script type='text/javascript'>alert('$_info');</script>"; exit(); } /** * 系统基本参数上传图片专用 * @param string $_path * @return null */ static public function sysUploadImg($_path) { echo '<script type="text/javascript">document.getElementById("logo").value="'.$_path.'";</script>'; echo '<script type="text/javascript">document.getElementById("pic").src="'.$_path.'";</script>'; echo '<script type="text/javascript">$("#loginpop1").hide();</script>'; echo '<script type="text/javascript">$("#bgloginpop2").hide();</script>'; } /** * html过滤 * @param array|object $_date * @return string */ static public function htmlString($_date) { if (is_array($_date)) { foreach ($_date as $_key=>$_value) { $_string[$_key] = Tool::htmlString($_value); //递归 } } elseif (is_object($_date)) { foreach ($_date as $_key=>$_value) { $_string->$_key = Tool::htmlString($_value); //递归 } } else { $_string = htmlspecialchars($_date); } return $_string; } /** * 数据库输入过滤 * @param string $_data * @return string */ static public function mysqlString($_data) { $_data = trim($_data); return !GPC ? addcslashes($_data) : $_data; } /** * 清理session */ static public function unSession() { if (session_start()) { session_destroy(); } } /** * 验证是否为空 * @param string $str * @param string $name * @return bool (true or false) */ static function validateEmpty($str, $name) { if (empty($str)) { self::alertBack('警告：' .$name . '不能为空！'); } } /** * 验证是否相同 * @param string $str1 * @param string $str2 * @param string $alert * @return JS */ static function validateAll($str1, $str2, $alert) { if ($str1 != $str2) self::alertBack('警告：' .$alert); } /** * 验证ID * @param Number $id * @return JS */ static function validateId($id) { if (empty($id) || !is_numeric($id)) self::alertBack('警告：参数错误！'); } /** * 格式化字符串 * @param string $str * @return string */ static public function formatStr($str) { $arr = array(' ', ' ', '&', '@', '#', '%', '\'', '"', '\\', '/', '.', ',', '$', '^', '*', '(', ')', '[', ']', '{', '}', '|', '~', '`', '?', '!', ';', ':', '-', '_', '+', '='); foreach ($arr as $v) { $str = str_replace($v, '', $str); } return $str; } /** * 格式化时间 * @param int $time 时间戳 * @return string */ static public function formatDate($time='default') { $date = $time == 'default' ? date('Y-m-d H:i:s', time()) : date('Y-m-d H:i:s', $time); return $date; } /** * 获得真实IP地址 * @return string */ static public function realIp() { static $realip = NULL; if ($realip !== NULL) return $realip; if (isset($_SERVER)) { if (isset($_SERVER['HTTP_X_FORWARDED_FOR'])) { $arr = explode(',', $_SERVER['HTTP_X_FORWARDED_FOR']); foreach ($arr AS $ip) { $ip = trim($ip); if ($ip != 'unknown') { $realip = $ip; break; } } } elseif (isset($_SERVER['HTTP_CLIENT_IP'])) { $realip = $_SERVER['HTTP_CLIENT_IP']; } else { if (isset($_SERVER['REMOTE_ADDR'])) { $realip = $_SERVER['REMOTE_ADDR']; } else { $realip = '0.0.0.0'; } } } else { if (getenv('HTTP_X_FORWARDED_FOR')) { $realip = getenv('HTTP_X_FORWARDED_FOR'); } elseif (getenv('HTTP_CLIENT_IP')) { $realip = getenv('HTTP_CLIENT_IP'); } else { $realip = getenv('REMOTE_ADDR'); } } preg_match('/[\d\.]{7,15}/', $realip, $onlineip); $realip = !empty($onlineip[0]) ? $onlineip[0] : '0.0.0.0'; return $realip; } /** * 加载 Smarty 模板 * @param string $html * @return null; */ static public function display() { global $tpl;$html = null; $htmlArr = explode('/', $_SERVER[SCRIPT_NAME]); $html = str_ireplace('.php', '.html', $htmlArr[count($htmlArr)-1]); $dir = dirname($_SERVER[SCRIPT_NAME]); $firstStr = substr($dir, 0, 1); $endStr = substr($dir, strlen($dir)-1, 1); if ($firstStr == '/' || $firstStr == '\\') $dir = substr($dir, 1); if ($endStr != '/' || $endStr != '\\') $dir = $dir . '/'; $tpl->display($dir.$html); } /** * 创建目录 * @param string $dir */ static public function createDir($dir) { if (!is_dir($dir)) { mkdir($dir, 0777); } } /** * 创建文件（默认为空） * @param unknown_type $filename */ static public function createFile($filename) { if (!is_file($filename)) touch($filename); } /** * 正确获取变量 * @param string $param * @param string $type * @return string */ static public function getData($param, $type='post') { $type = strtolower($type); if ($type=='post') { return Tool::mysqlString(trim($_POST[$param])); } elseif ($type=='get') { return Tool::mysqlString(trim($_GET[$param])); } } /** * 删除文件 * @param string $filename */ static public function delFile($filename) { if (file_exists($filename)) unlink($filename); } /** * 删除目录 * @param string $path */ static public function delDir($path) { if (is_dir($path)) rmdir($path); } /** * 删除目录及地下的全部文件 * @param string $dir * @return bool */ static public function delDirOfAll($dir) { //先删除目录下的文件： if (is_dir($dir)) { $dh=opendir($dir); while (!!$file=readdir($dh)) { if($file!="." && $file!="..") { $fullpath=$dir."/".$file; if(!is_dir($fullpath)) { unlink($fullpath); } else { self::delDirOfAll($fullpath); } } } closedir($dh); //删除当前文件夹： if(rmdir($dir)) { return true; } else { return false; } } } /** * 验证登陆 */ static public function validateLogin() { if (empty($_SESSION['admin']['user'])) header('Location:/admin/'); } /** * 给已经存在的图片添加水印 * @param string $file_path * @return bool */ static public function addMark($file_path) { if (file_exists($file_path) && file_exists(MARK)) { //求出上传图片的名称后缀 $ext_name = strtolower(substr($file_path, strrpos($file_path, '.'), strlen($file_path))); //$new_name='jzy_' . time() . rand(1000,9999) . $ext_name ; $store_path = ROOT_PATH . UPDIR; //求上传图片高宽 $imginfo = getimagesize($file_path); $width = $imginfo[0]; $height = $imginfo[1]; //添加图片水印 switch($ext_name) { case '.gif': $dst_im = imagecreatefromgif($file_path); break; case '.jpg': $dst_im = imagecreatefromjpeg($file_path); break; case '.png': $dst_im = imagecreatefrompng($file_path); break; } $src_im = imagecreatefrompng(MARK); //求水印图片高宽 $src_imginfo = getimagesize(MARK); $src_width = $src_imginfo[0]; $src_height = $src_imginfo[1]; //求出水印图片的实际生成位置 $src_x = $width - $src_width - 10; $src_y = $height - $src_height - 10; //新建一个真彩色图像 $nimage = imagecreatetruecolor($width, $height); //拷贝上传图片到真彩图像 imagecopy($nimage, $dst_im, 0, 0, 0, 0, $width, $height); //按坐标位置拷贝水印图片到真彩图像上 imagecopy($nimage, $src_im, $src_x, $src_y, 0, 0, $src_width, $src_height); //分情况输出生成后的水印图片 switch($ext_name) { case '.gif': imagegif($nimage, $file_path); break; case '.jpg': imagejpeg($nimage, $file_path); break; case '.png': imagepng($nimage, $file_path); break; } //释放资源 imagedestroy($dst_im); imagedestroy($src_im); unset($imginfo); unset($src_imginfo); //移动生成后的图片 @move_uploaded_file($file_path, ROOT_PATH.UPDIR . $file_path); } } /** * 中文截取2，单字节截取模式 * @access public * @param string $str 需要截取的字符串 * @param int $slen 截取的长度 * @param int $startdd 开始标记处 * @return string */ static public function cn_substr($str, $slen, $startdd=0){ $cfg_soft_lang = PAGECHARSET; if($cfg_soft_lang=='utf-8') { return self::cn_substr_utf8($str, $slen, $startdd); } $restr = ''; $c = ''; $str_len = strlen($str); if($str_len < $startdd+1) { return ''; } if($str_len < $startdd + $slen || $slen==0) { $slen = $str_len - $startdd; } $enddd = $startdd + $slen - 1; for($i=0;$i<$str_len;$i++) { if($startdd==0) { $restr .= $c; } elseif($i > $startdd) { $restr .= $c; } if(ord($str[$i])>0x80) { if($str_len>$i+1) { $c = $str[$i].$str[$i+1]; } $i++; } else { $c = $str[$i]; } if($i >= $enddd) { if(strlen($restr)+strlen($c)>$slen) { break; } else { $restr .= $c; break; } } } return $restr; } /** * utf-8中文截取，单字节截取模式 * * @access public * @param string $str 需要截取的字符串 * @param int $slen 截取的长度 * @param int $startdd 开始标记处 * @return string */ static public function cn_substr_utf8($str, $length, $start=0) { if(strlen($str) < $start+1) { return ''; } preg_match_all("/./su", $str, $ar); $str = ''; $tstr = ''; //为了兼容mysql4.1以下版本,与数据库varchar一致,这里使用按字节截取 for($i=0; isset($ar[0][$i]); $i++) { if(strlen($tstr) < $start) { $tstr .= $ar[0][$i]; } else { if(strlen($str) < $length + strlen($ar[0][$i]) ) { $str .= $ar[0][$i]; } else { break; } } } return $str; } /** * 删除图片，根据图片ID * @param int $image_id */ static function delPicByImageId($image_id) { $db_name = PREFIX . 'images i'; $m = new Model(); $data = $m->getOne($db_name, "i.id={$image_id}", "i.path as p, i.big_img as b, i.small_img as s"); foreach ($data as $v) { @self::delFile(ROOT_PATH . $v['p']); @self::delFile(ROOT_PATH . $v['b']); @self::delFile(ROOT_PATH . $v['s']); } $m->del(PREFIX . 'images', "id={$image_id}"); unset($m); } /** * 图片等比例缩放 * @param resource $im 新建图片资源(imagecreatefromjpeg/imagecreatefrompng/imagecreatefromgif) * @param int $maxwidth 生成图像宽 * @param int $maxheight 生成图像高 * @param string $name 生成图像名称 * @param string $filetype文件类型(.jpg/.gif/.png) */ static public function resizeImage($im, $maxwidth, $maxheight, $name, $filetype) { $pic_width = imagesx($im); $pic_height = imagesy($im); if(($maxwidth && $pic_width > $maxwidth) || ($maxheight && $pic_height > $maxheight)) { if($maxwidth && $pic_width>$maxwidth) { $widthratio = $maxwidth/$pic_width; $resizewidth_tag = true; } if($maxheight && $pic_height>$maxheight) { $heightratio = $maxheight/$pic_height; $resizeheight_tag = true; } if($resizewidth_tag && $resizeheight_tag) { if($widthratio<$heightratio) $ratio = $widthratio; else $ratio = $heightratio; } if($resizewidth_tag && !$resizeheight_tag) $ratio = $widthratio; if($resizeheight_tag && !$resizewidth_tag) $ratio = $heightratio; $newwidth = $pic_width * $ratio; $newheight = $pic_height * $ratio; if(function_exists("imagecopyresampled")) { $newim = imagecreatetruecolor($newwidth,$newheight); imagecopyresampled($newim,$im,0,0,0,0,$newwidth,$newheight,$pic_width,$pic_height); } else { $newim = imagecreate($newwidth,$newheight); imagecopyresized($newim,$im,0,0,0,0,$newwidth,$newheight,$pic_width,$pic_height); } $name = $name.$filetype; imagejpeg($newim,$name); imagedestroy($newim); } else { $name = $name.$filetype; imagejpeg($im,$name); } } /** * 下载文件 * @param string $file_path 绝对路径 */ static public function downFile($file_path) { //判断文件是否存在 $file_path = iconv('utf-8', 'gb2312', $file_path); //对可能出现的中文名称进行转码 if (!file_exists($file_path)) { exit('文件不存在！'); } $file_name = basename($file_path); //获取文件名称 $file_size = filesize($file_path); //获取文件大小 $fp = fopen($file_path, 'r'); //以只读的方式打开文件 header("Content-type: application/octet-stream"); header("Accept-Ranges: bytes"); header("Accept-Length: {$file_size}"); header("Content-Disposition: attachment;filename={$file_name}"); $buffer = 1024; $file_count = 0; //判断文件是否结束 while (!feof($fp) && ($file_size-$file_count>0)) { $file_data = fread($fp, $buffer); $file_count += $buffer; echo $file_data; } fclose($fp); //关闭文件 }}?>Copy after login
?
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
