PHP实用类

来源：互联网发布：smarty二维数组遍历编辑：程序博客网时间：2024/04/30 19:50

1.分页类

<?php

/////////////////////////////分页类/////////////////////////////
/*
* 程序原做:北极星
* e_mail:superstarfu1985@163.com
* QQ:327553822
* 时间：2009.2.2
*调用方式:
*   $p  = new page($rows,12,6);
*   $p->page_set($_GET['page']);
*   $limit = $p->limit();
*   $p->page_show();
*显示:
*   << < 1 2 3 4 5 6 7 > >>
*
*$page_gap_length-->当前页到左右两边页码之间的间距
*/
class page
{
private $row_per_page;   //每页取出的记录条数
private $current_page;  //当前页
private $page_gap_length; //当前页到左右两边页码之间的间距
private $total_pages;  //总页数
private $pre_page;   //上一页
private $next_page;   //下一页
private $link_head;   //得到"page="之前的字符串

public function page($total,$row_per_page=5,$page_gap_length=2)
{
  $this->row_per_page  = $row_per_page;
  $this->page_gap_length = $page_gap_length;
  $this->total_pages  = ceil($total/$row_per_page);
  $this->parse_query();
}

public function parse_query()
{
  $arr  = explode("page=",$_SERVER['QUERY_STRING']); //分割
  $arr_left = $arr[0];
  if(empty($arr_left)){
   $this->link_head = $_SERVER['PHP_SELF']."?";
  } else {
   $arr_left = (substr($arr_left,-1) == "&") ? $arr_left: $arr_left."&";
   $this->link_head = $_SERVER['PHP_SELF']."?".$arr_left;
  }
}
/////////////////下拉列表方式,分页跳转//////////////
public function page_sel()
{
  if($this->total_pages <= 1){
   $sel = "";
  } else {
   $sel = "<select onchange='window.location=this.value'>";
   for($i=1; $i<=$this->total_pages; $i++){
    $sel .= ($i == $this->current_page) ? "<option value='".$this->link_head."page=".$i."' selected>".$i."</option>" : "<option value='".$this->link_head."page=".$i."'>".$i."</option>";
   }
   $sel .= "</select>";
  }
  return $sel;
}
////////////////////////由GET传值$_GET['page'],确定当前页、上一页、下一页////////////////////////
public function page_set($current_page)
{
  if(!is_numeric($current_page) || empty($current_page) || $current_page == 0){
   $this->current_page = 1;
  } else {
   $this->current_page = $current_page;
  }
   $this->next_page = ($this->total_pages <= ($this->current_page+1)) ? $this->total_pages : ($this->current_page+1);
   $this->pre_page  = ($this->current_page-1) < 1 ? 1 : ($this->current_page-1);
}

public function limit()
{
  return ($this->current_page-1)*$this->row_per_page.",".$this->row_per_page;
}
public function page_show()
{
   if(!empty($this->total_pages)){
  $page_list = "<a href='".$this->link_head."page=1' title='首页'><<</a> ";
  $page_list .= "<a href='".$this->link_head."page=".$this->pre_page."' title='上一页'><</a> ";
  $m = $this->current_page-$this->page_gap_length;
  $n = $this->current_page+$this->page_gap_length;
  $p = ($m <= 0) ? 1 : $m;
  $q = ($n >= $this->total_pages) ? $this->total_pages : $n;
  for( $i = $p; $i<=$q; $i++){
   $page_list .= "<a href='".$this->link_head."page=".$i."' title='第".$i."页'>".$i."</a> ";
  }

  $page_list .= "<a href='".$this->link_head."page=".$this->next_page."' title='下一页'>></a> ";
  $page_list .= "<a href='".$this->link_head."page=".$this->total_pages."' title='尾页'>>></a>";
  $page_list .= "   ".$this->page_sel();
  echo $page_list;
   }
}
}
?>

2.字符串截取类

<?php

//字符串处理函数
/*
*$str:要截取的字符串
*$start:从哪里开始截取
*$len:截取长度
*/
function msubstr($str,$start,$len)//字符位置从0开始
{
$strlen=$start+$len;
for($i=0;$i<$strlen;$i++)
{
  //如果读取的是双字节字符，则一次要读取两个字节的长度，否则，会出现意外情况
  if(ord(substr($str,$i,1))>0xa0)
  {
   $tmpstr.=substr($str,$i,2);
   $i++;
  }
  else｛

   $tmpstr.=substr($str,$i,1);
  ｝

}
$tmpstr = (strlen($str) <= $len) ? $tmpstr : $tmpstr."...";

return $tmpstr;

}

3.表单类

<?php

   //////////////////////////表单类///////////////////////
class form
{
private $action;
private $method;
private $enctype;
private $id;
private $name;
private $sty; //表单样式

public function form($action="",$id="",$name="",$method="POST",$enctype="multipart/form-data",$sty="")
{
  $this->action = $action;
  $this->method = $method;
  $this->enctype = $enctype;
  $this->id  = $id;
  $this->name  = $name;
  $this->sty  = $sty;
}
public function form_start()
{
  echo "<form action='".$this->action."' method='".$this->method."' enctype='".$this->enctype."' style='".$sty."' id='".$this->id."' name='".$this->name."'>";
}
public function create_text($type,$name,$value,$sty="",$id="",$onclick="javascript:void(0);")
{
  $text = "<input type='".$type."' name='".$name."' value='".$value."' id='".$id."' style='".$sty."' onclick='".$onclick."'>";
  echo $text;
}
public function create_textarea($name,$value,$sty="")
{
  $textarea = "<textarea name='".$name."' style='".$sty."'>".$value."</textarea>";
  echo $textarea;
}
public function create_file($name,$sty="")
{
  $file = "<input type='file' name='".$name."' style='".$sty."'>";
  echo $file;
}
public function create_sub($name,$value="提交",$sty="")
{
  $sub = "<input type='submit' name='".$name."' value='".$value."' style='".$sty."'>";
  echo $sub;
}
public function form_end()
{
  echo "</form>";
}

}

4.文件上传类

<?PHP

/*********************文件上传类**********************/
/**
*调用方法:
* $upload = new uploadfile($_FILES['pic']);
* $upload->upload("pic");
*
*/
class uploadfile
{
private $root; //文件存放根目录

//文件类型
private $typearr = array('pic'=>array(".jpg",".gif",".bmp",".png"),
        'txt'=>array(".txt",".doc",".xls",".ppt"),
        'rar'=>array(".rar",".zip"));

private $posarr = array(); //存放对应文件类型格式的数组

private $filearr = array(); //存放上传文件各项参数的数组

//php5构造函数
public function __construct(&$arr,$root="./file/")
{
  $this->root  = $root;
  $this->filearr = $arr;
  if(!file_exists($this->root)){
   $this->_mkdir($this->root);
  }
}
//php4构造函数
public function uploadfile(&$arr,$root="./file/")
{

  $this->__construct(&$arr,$root="./file/");

}

//目录创建
public function _mkdir($root)
{
  chmod($root,0777); //分配给目录最大可能的访问权
  mkdir($root); //创建目录
}

//上传文件
public function upload($ftype = "pic")
{

  foreach($this->typearr as $key => $va){
   if($ftype == $key){
    $this->posarr = $va; //将对应文件格式存放到数组$posarr中
    break;
   }
  }

  foreach($this->filearr as $key => $va){
   if(is_array($va)){
    foreach($this->filearr['error'] as $p => $error){
     //没有错误发生
     if($error == UPLOAD_ERR_OK){
      $tmp_name = $this->filearr["tmp_name"][$p];
      $name  = $this->filearr["name"][$p];
      $pos  = strrchr($name,".");

      if(!in_array($pos,$this->posarr)){
       echo "<script language='javascript'>alert('你上传的文件格式不对吧？^-^');history.go(-1);</script>";
       exit();
      }
      $rename = date("YmdHis").$p.$pos;
      $path = $this->root.$rename;
      move_uploaded_file($tmp_name,$path);
     }

    }
   } else {
    $tmp_name = $this->filearr['tmp_name'];
    $name  = $this->filearr['name'];
    $pos  = strrchr($name,".");
    if(!in_array($pos,$this->posarr)){
     echo "<script language='javascript'>alert('你上传的文件格式不对吧？^-^');history.go(-1);</script>";
     exit();
    }
    $rename = date("YmdHis").$pos;
    $path = $this->root.$rename;
    move_uploaded_file($tmp_name,$path);
   }

  }
}

}

未完待续。。。