PHP实现的oracle分页函数实例

本文实例讲述了PHP实现的oracle分页函数。分享给大家供大家参考，具体如下：

mysql有limit，分页的时候，我们可以用limit 30,40,而oracle没有limit，用其他的方法来代替－－rownum.

一、底层方法

function connect($db_user, $db_pwd, $db_name, $db_nls)
{
 $this->dbh = oci_connect($db_user, $db_pwd, $db_name, $db_nls);
}
function getall($query, $start=0, $rows=-1)
{
 $this->dbh = emptyempty($this->dbh) ? $this->connect() : $this->dbh;
 $this->sth = oci_parse($this->dbh, $query);
 oci_execute($this->sth, OCI_DEFAULT) or $this->error($this->sth, $query);
 oci_fetch_all($this->sth, $res, $start, $rows, OCI_FETCHSTATEMENT_BY_ROW+OCI_ASSOC);
 return $res;
}

function getpage($query, $total, $page, $rows=VAR_PAGENAV_ROWS)
{
 $start_row = ($page - 1) * $rows + 1;
 $start_row = $start_row > $total ? 1 : $start_row;
 $end_row  = $start_row + $rows - 1;
 $end_row  = $end_row > $total ? $total : $end_row;
 $query   = "SELECt * FROM ( SELECt ROWNUM as row_num, r.* FROM ( $query ) r WHERe ROWNUM <= $end_row ) WHERe $start_row <= row_num";
 return $this->getall($query);
}

function getcount($sql){
 $subSQL = 'select count(*) '.stristr($sql, 'from');
 return $this->getone($subSQL);
}
function getone($query)
{
 $row = $this->getrow($query);
 if (is_array($row))
 $one = current($row);
 else
 $one = '';
 unset($row);
 return $one;
}
function getrow($query)
{
 if (false === stripos($query, 'COUNT(')) {
 if (false === stripos($query, 'WHERe')) {
 $query .= ' WHERe ROWNUM = 1';
 } else {
 $query .= ' AND ROWNUM = 1';
 }
 }
 $result = $this->getall($query, 0, 1);
 if (emptyempty($result))
 $row = array();
 else
 $row = $result[0];
 unset($result);
 return $row;
}

主要二个方法我写一点注释

二、调用方法

$total = $this->db->getcount($sql);
$result = $this->db->getpage($sql,$total,$page,$page_number);

上面只是贴出部分代码，也是最核心的。

更多关于PHP数据库操作相关内容感兴趣的读者可查看本站专题：《php常见数据库操作技巧汇总》、《PHP基于pdo操作数据库技巧总结》及《php+mysql数据库操作入门教程》。

希望本文所述对大家PHP程序设计有所帮助。