银子 ’s 博客

/**
* 生成文件缓存
*
* @param string $filePath 缓存文件的保存路径
* @param string $arrayName 存放在缓存文件中的数组名称
* @param array $data 数据
*
* @return boolean
*/
DataCache::writeCache($filePath, $arrayName, $data);

<?php
class DataCache
{
 
	/**
	 * 数组转换
	 *
	 * @param array $array
	 * @param string $arrayName
	 * @param array $level
	 *
	 * @return string
	 */
	private function arrayEval($array, $arrayName = '', $level = 0)
	{
		$space = str_repeat("\t", $level);
 
		if (empty($arrayName))
		{
			$evaluate = "array\n$space(\n";
		}
		else
		{
			$evaluate = "\${$arrayName} = array\n$space(\n";
		}
 
		$space2 = str_repeat("\t", $level + 1);
		$comma = $space2;
		if (!empty($array))
		{
			foreach ($array as $key => $val)
			{
				$key = is_string($key) ? '\'' . addcslashes($key, '\'\\') . '\'' : $key;
				$val = !is_array($val) && (!preg_match('/^\-?[1-9]\d*$/', $val) || strlen($val) > 12) ? '\'' . addcslashes($val, '\'\\') . '\'' : $val;
				if (is_array($val))
				{
					$evaluate .= "$comma$key => " . arrayEval($val, '', $level + 1);
				}
				else
				{
					$evaluate .= "$comma$key => $val";
				}
				$comma = ",\n$space2";
			}
		}
		$evaluate .= "\n$space)";
 
		// 最后才需要一个“;”
		if ($level == 0)
		{
			$evaluate .= ";";
		}
		return $evaluate;
	}
 
	/**
	 * 写入缓存
	 *
	 * @param string $path
	 * @param string $arrayName
	 * @param array  $data
	 *
	 * @return boolean
	 */
	public static function writeCache($path, $arrayName, $data)
	{
		if ($handle = fopen($path, 'w+'))
		{
			$data = self::arrayEval($data, $arrayName);
 
			$dataConvert = "<?php\n" . $data;
 
			flock($handle, LOCK_EX);
			$rs = fputs($handle, $dataConvert);
			flock($handle, LOCK_UN);
			fclose($handle);
			if ($rs !== false)
			{
				return true;
			}
		}
		return false;
	}
 
}