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
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
|
/** * 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
|
1
2
|
$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。
