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本文只是一個(gè)山寨試驗(yàn)品,思路僅供參考. -------------------------------------------------------------------------------- 原理介紹: 索引建立 目 錄結(jié)構(gòu)劃分方案也只是很簡易的實(shí)現(xiàn)了一下,通過unicode把任意連續(xù)的兩個(gè)字符(中文或英文)分為4個(gè)字節(jié)來做四層目錄,把

代碼如下:
<?php
$dsn = "mysql:host=localhost;dbname=group";
$db = new PDO($dsn, 'root', '');
$db->exec('set names utf8');

$sql = "select conf_id from `group` group by conf_id";
//$pre = $db->prepare($sql);
//$result_arr = array();
$pre = $db->query($sql);
$result_arr = $pre->fetchAll(PDO::FETCH_ASSOC);

//print_r ($result_arr);
foreach ($result_arr as $v)
{
echo $v[conf_id]."<br>";
$vv = $v[conf_id];
$re = array();
$sql1 = "select * from `group` where conf_id = '$v[conf_id]' order by time";
$sql2 = "select * from `group` where conf_id = '$v[conf_id]' order by time DESC";
$rs1 = $db->query($sql1);
$rs2 = $db->query($sql2);
$re1[$vv] = $rs1->fetchAll(PDO::FETCH_ASSOC);
$re2[$vv] = $rs2->fetchAll(PDO::FETCH_ASSOC);
print_r($re1[$vv][0]);
print_r($re2[$vv][0]);
}

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