1、插入数据

$db->query("INSERT INTO ".get_table($mid)." ($sqlk) VALUES ($sqlv)");

$itemid = $db->insert_id();

2、获取一条数据

$r = $db->get_one("SELECT COUNT(*) AS num FROM {$table} WHERE $condition order by statid desc");

if($r['num']>0){

exit('{"status":"0","msg":"重复"}');

}else{

}

函数在include/db_mysql.class.php 中定义

function query($sql, $type = '', $ttl = 0, $save_id = false) {

#echo $sql;echo '
';

$select = strtoupper(substr($sql, 0, 7)) == 'SELECT ' ? 1 : 0;

if($this->ttl > 0 && $type == 'CACHE' && $select) {

$this->cursor = 0;

$this->cache_id = md5($sql);

if($this->cids) $this->cache_ids[] = $this->cache_id;

$this->result = array();

$this->cache_ttl = ($ttl ? $ttl : $this->ttl) + mt_rand(-10, 30);

return $this->_query($sql);

}

if(!$save_id) $this->cache_id = 0;

$func = $type == 'UNBUFFERED' ? 'mysql_unbuffered_query' : 'mysql_query';

if(!($query = $func($sql, $this->connid))) $this->halt('MySQL Query Error', $sql);

$this->querynum++;

return $query;

}

function get_one($sql, $type = '', $ttl = 0) {

$sql = str_replace(array('select ', ' limit '), array('SELECT ', ' LIMIT '), $sql);

if(strpos($sql, 'SELECT ') !== false && strpos($sql, ' LIMIT ') === false) $sql .= ' LIMIT 0,1';

$query = $this->query($sql, $type, $ttl);

$r = $this->fetch_array($query);

$this->free_result($query);

return $r;

}

function count($table, $condition = '', $ttl = 0) {

global $DT_TIME;

$sql = 'SELECT COUNT(*) as amount FROM '.$table;

if($condition) $sql .= ' WHERE '.$condition;

$r = $this->get_one($sql, $ttl ? 'CACHE' : '', $ttl);

return $r ? $r['amount'] : 0;

}

function fetch_array($query, $result_type = MYSQL_ASSOC) {

return $this->cache_id ? $this->_fetch_array($query) : mysql_fetch_array($query, $result_type);

}

function affected_rows() {

return mysql_affected_rows($this->connid);

}

function num_rows($query) {

return mysql_num_rows($query);

}

function num_fields($query) {

return mysql_num_fields($query);

}

function result($query, $row) {

return @mysql_result($query, $row);

}

function free_result($query) {

if(is_resource($query) && get_resource_type($query) === 'mysql result') {

return @mysql_free_result($query);

}

}

function insert_id() {

return mysql_insert_id($this->connid);

}

function fetch_row($query) {

return mysql_fetch_row($query);

}