This article describes the oracle pagination function implemented by PHP. Share it for your reference, as follows:
MySQL has limit. When paging, we can use limit 30, 40, while Oracle does not have limit. Use other methods to replace - rownum.
1. The underlying method
/**
* Data connection
*/
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;
}
/**
* Get the number of pages
*
* $query string query statement
* $total int Total number of entries
* $page int Number of pages
* $rows int Number of displays per page
* @return integer Total row count
*/
function getpage($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);
}
/**
* Get the total number of rows of a query
*
* $string $sql query statement
*
* return integer Total row count
*/
function getcount($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;
}
I'll write some comments on the two main methods
2. Calling methods
$total = $this->db->getcount($sql); $result = $this->db->getpage($sql,$total,$page,$page_number);
The above is just a part of the code, which is also the most core.
For more information about PHP database operations, please visit the special topic of this site:Summary of common database operation techniques for php》、《Summary of PHP's skills to operate database based on pdo"and"PHP+mysql database operation tutorial》。
I hope this article will be helpful to everyone's PHP programming.