php常用工具类

/**
* 常用工具类
* @author wj
* @date 2015-4-15
*/
class Tool {
/**
* js 弹窗并且跳转
* @param string $_info
* @param string $_url
* @return js
*/
static public function alertLocation($_info, $_url) {
echo "";
exit();
}

/**
* js 弹窗返回
* @param string $_info
* @return js
*/
static public function alertBack($_info) {
echo "";
exit();
}

/**
* 页面跳转
* @param string $url
* @return js
*/
static public function headerUrl($url) {
echo "";
exit();
}

/**
* 弹窗关闭
* @param string $_info
* @return js
*/
static public function alertClose($_info) {
echo "";
exit();
}

/**
* 弹窗
* @param string $_info
* @return js
*/
static public function alert($_info) {
echo "";
exit();
}

/**
* 系统基本参数上传图片专用
* @param string $_path
* @return null
*/
static public function sysUploadImg($_path) {
echo '';
echo '';
echo '';
echo '';
}

/**
* 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
}
}