有几种方法可以做到这一点。
首先是 mysql 偏移量(没有得到所有行但需要部分(你可能有 10000 行 - 一次都会有问题))。
如果您有很多记录,或者您想为将来做准备,可以使用第一个示例,因为它可以处理大型记录组。
如果您有一小部分记录,或者您对数据库预脚本执行进行某种缓存,则可以使用第二个示例。
示例 #1:
mysql -
SELECT col1, col2, col3, col4 FROM MyTable LIMIT 4 OFFSET 0
php -
session_start();
$position = isset($_SESSION['display_position']) ? $_SESSION['display_position'] : 0;
$limit = 4;
if(empty($position))
$_SESSION['display_position'] = 0;
$sql = 'SELECT col1, col2, col3, col4 FROM MyTable LIMIT '.$limit.' OFFSET '.$position;
$result = mysql_query($sql);
// We don't want to fetch non existen resource
if($result)
{
while($rows = mysql_fetch_array($result))
{
echo $rows;
}
}
else
{
echo 'No more records';
exit;
}
// Update session for next run
$_SESSION['display_position'] = $position + $limit;
其他将是例如数组循环和在 $_SESSION 中存储位置。
示例 #2:
mysql -
SELECT col1, col2, col3, col4 FROM MyTable
php -
session_start();
$records = array('row1', 'row2', 'row3', 'row4', 'row5', 'row6', 'row7', 'row8', 'row9', 'row10');
$position = isset($_SESSION['display_position']) ? $_SESSION['display_position'] : 0;
$limit = 4;
if(empty($position))
$_SESSION['display_position'] = 0;
if(count($records) < $position)
{
echo 'No more records';
exit;
}
for($i = $position; $i < $position + $limit; $i++)
{
// Display rows
if(isset($records[$i]))
echo $records[$i];
}
// Update session for next run
$_SESSION['display_position'] = $position + $limit;
注意:调整$limit
变量以满足您的需要。
您的具体用例(更新):
session_start();
$records = array(
array(
'col1' => 'col1valuerow1',
'col2' => 'col2valuerow1',
'col3' => 'col3valuerow1',
'col4' => 'col4valuerow1'
),
array(
'col1' => 'col1valuerow2',
'col2' => 'col2valuerow2',
'col3' => 'col3valuerow2',
'col4' => 'col4valuerow2'
),
array(
'col1' => 'col1valuerow3',
'col2' => 'col2valuerow3',
'col3' => 'col3valuerow3',
'col4' => 'col4valuerow3'
),
array(
'col1' => 'col1valuerow4',
'col2' => 'col2valuerow4',
'col3' => 'col3valuerow4',
'col4' => 'col4valuerow4'
),
array(
'col1' => 'col1valuerow5',
'col2' => 'col2valuerow5',
'col3' => 'col3valuerow5',
'col4' => 'col4valuerow5'
),
array(
'col1' => 'col1valuerow6',
'col2' => 'col2valuerow6',
'col3' => 'col3valuerow6',
'col4' => 'col4valuerow6'
),
array(
'col1' => 'col1valuerow7',
'col2' => 'col2valuerow7',
'col3' => 'col3valuerow7',
'col4' => 'col4valuerow7'
),
array(
'col1' => 'col1valuerow8',
'col2' => 'col2valuerow8',
'col3' => 'col3valuerow8',
'col4' => 'col4valuerow8'
),
array(
'col1' => 'col1valuerow9',
'col2' => 'col2valuerow9',
'col3' => 'col3valuerow9',
'col4' => 'col4valuerow9'
),
array(
'col1' => 'col1valuerow10',
'col2' => 'col2valuerow10',
'col3' => 'col3valuerow10',
'col4' => 'col4valuerow10'
)
);
$position = isset($_SESSION['display_position']) ? $_SESSION['display_position'] : 0;
$limit = 1;
if(empty($position))
$_SESSION['display_position'] = 0;
if(count($records) < $position)
{
echo 'No more records';
exit;
}
for($i = $position; $i < $position + $limit; $i++)
{
// Display rows
if(isset($records[$i])){
echo $records[$i]['col1'] . '<br/>';
echo $records[$i]['col2'] . '<br/>';
echo $records[$i]['col3'] . '<br/>';
echo $records[$i]['col4'] . '<br/>';
}
}
// Update session for next run
$_SESSION['display_position'] = $position + $limit;