Posted in PHP onJanuary 25, 2016
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
/** * 数据连接 */ 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; } /** * 获取分页数 * * $query string 查询语句 * $total int 总条数 * $page int 页数 * $rows int 每页显示数 * @return integer 总行数 */ function getpage($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); } /** * 获取一个查询的总行数 * * $string $sql 查询语句 * * return integer 总行数 */ function getcount($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。
希望本文所述对大家PHP程序设计有所帮助。
PHP实现的oracle分页函数实例
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