php函数封装

// 弹框跳转
function alert($msg,$url=''){
   echo "<script>";
   echo "alert('$msg');";
   if($url){
      echo "window.location.href='$url';";
   }else{
      echo "window.history.go(-1);";
   }
   echo "</script>";
}
 
 
//获取单条数据
function getONE($sql){
   $sql = mysql_query($sql);
   $list = array();
   if($sql && mysql_affected_rows()>0){
      $list = mysql_fetch_assoc($sql);
   }return $list;
}
 
//获取多条数据
function getALL($sql){
   $sql = mysql_query($sql);
   $list = array();
   if($sql && mysql_affected_rows()>0){
      while($row = mysql_fetch_assoc($sql)){
      $list[] = $row;
      }
   }return $list;
}
 
/**
 * [delete 删除数据]
 * @param  [string] $table [表名]
 * @param  [string] $where [条件]
 * @return [boolean]       [返回结果]
 */
//删除数据SQL语句封装
function delete($table,$where){
   //构造删除的SQL语句
   $sql = "DELETE FROM `$table` WHERE $where;";   
   //把SQL语句执行
   $res = mysql_query($sql);
   //判断是否执行成功
   if($res && mysql_affected_rows()>0){
      return true;
   }else{
      return false;
   }
}
 
/**
 * [update 更新数据]
 * @param  [string] $table [表名]
 * @param  [array]  $array [要更新的数据]
 * @param  [string] $where [条件]
 * @return [type]        [返回结果]
 */
//更新数据SQL语句封装
function update($table,$array,$where){
   $str = '';
   foreach($array as $key => $value){
      $str .= "`".$key."`='".$value."',";
   }
   //去除最右边的逗号
   $str = rtrim($str,',');
   //构造更新的SQL语句
   $sql = "UPDATE `$table` SET $str WHERE $where";
   // dump($sql);exit;
   $res = mysql_query($sql);
   //判断是否执行成功
   if($res){
      return true;
   }else{
      return false;
   }
}
 
/**
 * [insert 插入数据]
 * @param  [string] $table [表名]
 * @param  [array] $data  [数据]
 * @return [bool]        [是否成功]
 */
function insert($table,$data){
   $tmp = array_keys($data);
   $field = '`'.implode('`,`', $tmp).'`';
   $value =  "'".implode("','",$data)."'";
   $sql = "INSERT INTO $table ($field) VALUES ($value)";
   // dump($sql);exit;
   $res = mysql_query($sql);
   if($res && mysql_affected_rows()>0){
      return mysql_insert_id();
   }else{
      return false;
   }
}
 
//pre预排版打印
function dump($content){
   echo "<pre>";
   print_r($content);
   echo "</pre>";
}
 
 
/**
 * 
 * 字符截取
 * @param string $string
 * @param int $start
 * @param int $length
 * @param string $charset
 * @param string $dot
 * 
 * @return string
 */
function str_cut(&$string, $start, $length, $charset = "utf-8", $dot = '...') {
   if(function_exists('mb_substr')) {
      if(mb_strlen($string, $charset) > $length) {
         return mb_substr ($string, $start, $length, $charset) . $dot;
      }
      return mb_substr ($string, $start, $length, $charset);
      
   }else if(function_exists('iconv_substr')) {
      if(iconv_strlen($string, $charset) > $length) {
         return iconv_substr($string, $start, $length, $charset) . $dot;
      }
      return iconv_substr($string, $start, $length, $charset);
   }
 
   $charset = strtolower($charset);
   switch ($charset) {
      case "utf-8" :
         preg_match_all("/[\x01-\x7f]|[\xc2-\xdf][\x80-\xbf]|\xe0[\xa0-\xbf][\x80-\xbf]|[\xe1-\xef][\x80-\xbf][\x80-\xbf]|\xf0[\x90-\xbf][\x80-\xbf][\x80-\xbf]|[\xf1-\xf7][\x80-\xbf][\x80-\xbf][\x80-\xbf]/", $string, $ar);         if(func_num_args() >= 3) {            if (count($ar[0]) > $length) {               return join("", array_slice($ar[0], $start, $length)) . $dot;            }            return join("", array_slice($ar[0], $start, $length));         } else {            return join("", array_slice($ar[0], $start));         }         break;      default:         $start = $start * 2;         $length   = $length * 2;         $strlen = strlen($string);         for ( $i = 0; $i < $strlen; $i++ ) {            if ( $i >= $start && $i < ( $start + $length ) ) {               if ( ord(substr($string, $i, 1)) > 129 ) $tmpstr .= substr($string, $i, 2);               else $tmpstr .= substr($string, $i, 1);            }            if ( ord(substr($string, $i, 1)) > 129 ) $i++;         }         if ( strlen($tmpstr) < $strlen ) $tmpstr .= $dot;                  return $tmpstr;   }}
 
 
/**
 * [uploads 文件上传函数]
 * @param  [string]  $name    [表单域的name名]
 * @param  [string]  $catalog [文件保存的路径]
 * @param  array   $type    [允许上传的文件类型]
 * @param  integer $size    [允许上传的文件大小]
 * @return [array]           [error 1 上传失败 2 上传成功]
 */
function uploads($name,$catalog,$type=array('jpg','jpeg','gif','png'),$size=1048576){
    $status = $_FILES[$name]['error'];
    if($status>0){
        switch($status){
            case 1:
                $res['msg'] = "文件上传超过最大值2M";
                $res['err'] = 1;
                return $res;
                break;
            case 2:
                $res['msg'] = "文件上传超过MAX_FILE_SIZE大小";
                $res['err'] = 1;
                return $res;
                break;
            case 3:
                $res['msg'] =  "文件上传失败";
                $res['err'] = 1;
                return $res;
                break;
            case 4:
                $res['msg'] =  '请选择文件';
                $res['err'] = 1;
                return $res;
                break;
            default:
                break;
        }
    }
    if($_FILES[$name]['size']>$size){
        $res['msg'] = '上传文件超出指定大小';
        $res['err'] = 1;
        return $res;
    }
$ext = pathinfo($_FILES[$name]['name'],PATHINFO_EXTENSION);
 
if(!in_array($ext,$type)){
        $res['msg'] = '请上传指定的文件类型';
        $res['err'] = 1;
        return $res;
    }
//第一种做法
    $catalog = rtrim($catalog,'/');
    $dir = $catalog;
    if(!is_dir($dir)){
        mkdir($dir,0777,true);
    }
    do{
        $file = time().mt_rand(1000,9999);
 
        $filename = $file.'.'.$ext;
 
        $newname = $dir.'/'.$filename;
 
    }while(is_file($dir.'/'.$filename));
move_uploaded_file($_FILES[$name]['tmp_name'], $dir.'/'.$filename);
    $res['msg'] = '文件上传成功';
    $res['err'] = 2;
    $res['filename'] = $filename;
    $res['name'] = $filename;
    return $res;
}
 
 
 
 
 
 
//封装缩略图的函数
function small($file,$widths,$heights,$address){
   $filename="$file";
   $info = getimagesize($filename);
 
   //获取图片的宽
   $width = $info[0];
   //获取图片的高
   $height = $info[1];
 
   //打开图片
   if($info[2]==1){
      $parent = imagecreatefromgif($filename);
   }else if($info[2]==2){
      $parent = imagecreatefromjpeg($filename);
   }else if($info[2]==3){
      $parent = imagecreatefrompng($filename);
   }
 
   $son_width = $widths;
   $son_height = $heights;
   // 等比例缩放
   // $son_height = ceil(($height*$son_width)/$width);
 
   //w/h = s_w/s_h
   //新建图像
   $son = imagecreatetruecolor($son_width,$son_height);
   
   imagecopyresized($son,$parent,0,0,0,0,$son_width,$son_height,$width,$height);
   $path = pathinfo($filename,PATHINFO_EXTENSION);
   $time = time();
   $pathname = $time.mt_rand(1000,9999).'.'.$path;
 
   $save = $address.$pathname;
   if($info[2]==1){      imagegif($son,$save);   }else if($info[2]==2){      imagejpeg($son,$save);   }else if($info[2]==3){      imagepng($son,$save);   }   imagedestroy($son);   imagedestroy($parent);   return $pathname;   }
 
/**
 * 获得用户的真实IP地址
 *
 * @access  public
 * @return  string
 */
function real_ip()
{
    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']);
 
            /* 取X-Forwarded-For中第一个非unknown的有效IP字符串 */
            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;}
 
/**
 * [arraySort 无限极分类函数]
 * @param  [type]  $arr      [description]
 * @param  integer $parentid [description]
 * @return [type]            [description]
 */
function arraySort($arr,$id,$pid,$parentid=0){
   $list=array();
   foreach($arr as $key => $v){
      if($v[$pid]==$parentid){
         $tmp = arraySort($arr,$id,$pid,$v[$id]);
         if($tmp){
            $v['submenu'] = $tmp;
         }
         $list[]=$v;
      }
   }
   return $list;
}