/**
* 写入缓存
* @access public
* @param string $name 缓存变量名
* @param mixed $value 存储数据
* @param int $expire 有效时间 0为永久
* @return boolen
*/
public function set($name, $value, $expire = null)
{
Debug::record('cache_write', 1);
if (is_null($expire)) {
$expire = $this->options['expire'];
}
$filename = $this->filename($name);
$data = serialize($value);
if (C('DATA_CACHE_COMPRESS') && function_exists('gzcompress')) {
//数据压缩
$data = gzcompress($data, 3);
}
if (C('DATA_CACHE_CHECK')) {
//开启数据校验
$check = md5($data);
} else {
$check = '';
}
$data = "<?php\n//" . sprintf('%012d', $expire) . $check . $data . "\n?>";
$result = file_put_contents($filename, $data);
if ($result) {
if ($this->options['length'] > 0) {
// 记录缓存队列
$this->queue($name);
}
clearstatcache();
return true;
} else {
return false;
}
}
/**
* 执行语句
* @access public
* @param string $str sql指令
* @return integer|false
*/
public function execute($str)
{
$this->initConnect(true);
if (!$this->_linkID) {
return false;
}
$this->queryStr = $str;
//释放前次的查询结果
if ($this->queryID) {
$this->free();
}
Debug::record('db_write', 1);
// 记录开始执行时间
Debug::mark('queryStartTime');
$result = mysql_query($str, $this->_linkID);
$this->debug();
if (false === $result) {
$this->error();
return false;
} else {
$this->numRows = mysql_affected_rows($this->_linkID);
$this->lastInsID = mysql_insert_id($this->_linkID);
return $this->numRows;
}
}