mysql sqlite 分页查询_php基于SQLite实现的分页功能示例
本文實(shí)例講述了php基于SQLite實(shí)現(xiàn)的分頁(yè)功能。分享給大家供大家參考,具體如下:
這里操作數(shù)據(jù)庫(kù)文件使用的是前面文章《PHP基于PDO實(shí)現(xiàn)的SQLite操作類【包含增刪改查及事務(wù)等操作】》中的SQLite數(shù)據(jù)庫(kù)操作類。廢話不說(shuō),直接上代碼:
class SqlitePage{
public function __construct()
{
$this->table_name='';
$this->tj='';
$this->page_size='';
$this->current_page='';
$this->total_page='';
include_once 'sqlite_db.php';
$this->db=new SqliteDB();//可以調(diào)用他的操作方法了
}
function entrance($table_name,$page_size,$tj='')//sql中不包含limit page_size為每頁(yè)顯示條數(shù)
{
// 首先獲取當(dāng)前頁(yè)
// sql = "select * from tab where "+條件+" order by "+排序+" limit "+要顯示多少條記錄+" offset "+跳過(guò)多少條記錄;
$this->page_size=$page_size;
$this->table_name=$table_name;
$this->tj=$tj;
$this->total_page=ceil($this->db->total($this->table_name,$this->tj)/$this->page_size);
if (!isset($_GET['page'])) {
$this->current_page=1;//如果沒有page,則設(shè)置為默認(rèn)第一頁(yè)
}
else{
$this->current_page=$_GET['page'];
}
if ($this->current_page>$this->total_page) {//當(dāng)當(dāng)前頁(yè)數(shù)目大于總頁(yè)數(shù),則設(shè)置當(dāng)前頁(yè)數(shù)為總頁(yè)數(shù)
$this->current_page=$this->total_page;
}
if ($this->current_page<1) {//當(dāng)當(dāng)前頁(yè)數(shù)目大于總頁(yè)數(shù),則設(shè)置當(dāng)前頁(yè)數(shù)為總頁(yè)數(shù)
$this->current_page=1;
}
$tj=$this->tj.' limit '.$this->page_size.' offset '.($this->current_page-1)*$this->page_size;
$result=$this->db->query($this->table_name,$tj);
return $result;
}
function page_bar()
{
$old_url = $_SERVER["REQUEST_URI"];
$check = strpos($old_url, '?');
$pre_urls='test';
if ($check) {//如果urls中有?
if(substr($old_url, $check+1) == '')
{ //有問(wèn)號(hào),但是后面沒有跟任何參數(shù)
$first_urls=$old_url.'page=1';//首頁(yè)
$pre_urls=$old_url.'page='.($this->current_page-1);//上一頁(yè);
$next_urls=$old_url.'page='.($this->current_page+1);//下一頁(yè);
$end_urls=$old_url.'page='.$this->total_page;//末頁(yè)
}
else {//有問(wèn)號(hào),并且有參數(shù)
if (isset($_GET['page'])) {//如果參數(shù)中包含page參數(shù),則注銷這個(gè)參數(shù)
unset($_GET['page']);
$old_url='http://'.$_SERVER['HTTP_HOST'].$_SERVER['PHP_SELF'].'?'.http_build_query($_GET);
}
$first_urls=$old_url.'&page=1';//首頁(yè)
$pre_urls=$old_url.'&page='.($this->current_page-1);//上一頁(yè);
$next_urls=$old_url.'&page='.($this->current_page+1);//下一頁(yè);
$end_urls=$old_url.'&page='.$this->total_page;//末頁(yè)
}
}
else{// 如果沒有問(wèn)號(hào)(也就是說(shuō)后面沒有任何參數(shù),則直接跟)
$first_urls=$old_url.'?page=1';
$first_urls=$old_url.'?page=1';//首頁(yè)
$pre_urls=$old_url.'?page='.($this->current_page-1);//上一頁(yè);
$next_urls=$old_url.'?page='.($this->current_page+1);//下一頁(yè);
$end_urls=$old_url.'?page='.$this->total_page;//末頁(yè)
}
// echo $this->table_name.'table_name';
return '
【共'.$this->total_page.'頁(yè),第'.$this->current_page.'頁(yè)】
首頁(yè)
上一頁(yè)
下一頁(yè)
末頁(yè)
';
}
public function get_total_page()
{
return ceil($this->total_record/$this->page_size);
}
}
// $page=new PrePage();
// $res=$page->entrance('log',10);
// echo "
";
// foreach ($res as $key => $row) {
// echo $row['urls'].'
';
// }
// echo $page->page_bar();
?>
希望本文所述對(duì)大家PHP程序設(shè)計(jì)有所幫助。
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