common.php

<?php

if (!defined('HOLY_LANCE_PASSWORD')) {
	define('HOLY_LANCE_PASSWORD', '');
}

function convert_boolean($value)
{
	if (is_bool($value) || in_array($value, array('true', 'false', '1', '0', 1, 0), true)) {
		return $value ? '√' : '×';
	} else {
		return $value;
	}
}

function get_config_value($varName)
{
	return convert_boolean(get_cfg_var($varName));
}

//格式化文件大小
function format_bytes($size, $precision = 2)
{
	// https://www.zhihu.com/question/21578998/answer/86401223
	// According to Metric prefix, IEEE 1541-2002.
	$units = array(
		' Bytes',
		' KiB',
		' MiB',
		' GiB',
		' TiB'
	);
	for ($i = 0; $size >= 1024 && $i < 4; $i++)
		$size /= 1024;
	return round($size, $precision) . $units[$i];
}

function format_number($number)
{
	return number_format($number, '0', '.', ' ');
}


function check_permission($file_name)
{
	$fp = @fopen($file_name, 'w');
	if (!$fp) {
		return false;
	} else {
		fclose($fp);
		@unlink($file_name);
		return true;
	}
}

function get_cpu_info_map($cpu_info_val)
{
	$result = array();
	foreach (explode("\n", $cpu_info_val) as $value) {
		if ($value) {
			$item = array_map("trim", explode(":", $value));
			$result[str_replace(" ", "_", $item[0])] = $item[1];
		}
	}
	return $result;
}

function get_mem_info_map($mem_info)
{
	$result = array();
	foreach ($mem_info as $value) {
		$value = str_ireplace(")", "", str_ireplace("(", "_", str_ireplace("kB", "", $value)));
		$item = array_map("trim", explode(":", $value));
		$result[str_replace(" ", "_", $item[0])] = $item[1];
	}
	return $result;
}

function convert_timestamp_2_string($timestamp)
{
	$timestamp = intval($timestamp);
	return intval($timestamp / 86400) . ":"
		. sprintf("%02d", $timestamp % 86400 / 3600) . ":"
		. sprintf("%02d", $timestamp % 3600 / 60) . ":"
		. sprintf("%02d", $timestamp % 60);
}

function check_password()
{
	if (HOLY_LANCE_PASSWORD !== '' && (!isset($_POST['password']) || $_POST['password'] !== HOLY_LANCE_PASSWORD)) {
		echo '{"status":false}';
		exit(1);
	}
	return true;
}


// 创建row socket 需要root权限，所以用root账户在CLI下运行可以成功，用www用户在fpm下运行可能会失败，但是不会报错
// 需要root权限运行则要php-fpm -R运行
// 目前针对没有root权限做了一套临时的兼容方案
function ping($host, $port = 80)
{
	$protocolNumber = getprotobyname('icmp');
	$socket = socket_create(AF_INET, SOCK_RAW, $protocolNumber);
	if ($socket === false) {// 没有Root权限，开启Raw socket失败，用TCP协议ping
		return ping_without_root($host, $port);
	}
	socket_set_option($socket, SOL_SOCKET, SO_RCVTIMEO, array('sec' => 1, 'usec' => 0));
	socket_connect($socket, $host, 0);
	$package = "\x08\x00\x19\x2f\x00\x00\x00\x00\x70\x69\x6e\x67";
	socket_send($socket, $package, strlen($package), 0);
	$ts1 = microtime(true);
	if (socket_read($socket, 255) !== false) {
		$ts2 = microtime(true);
		$result = round(($ts2 - $ts1) * 1000, 2) . ' ms';
	} else {
		$result = socket_strerror(socket_last_error($socket));
	}
	socket_close($socket);
	return $result;
}

function ping_without_root($host, $port)
{
	try {
		$err_no = null;
		$err_str = null;
		$ts1 = microtime(true);
		$fp = stream_socket_client("tcp://" . $host . ":" . $port, $err_no, $err_str, 3);
		$ts2 = microtime(true);
		$result = round(($ts2 - $ts1) * 1000, 2) . ' ms';
		if ($fp === false) {
			$result = 'Timeout';
		}
		fclose($fp);
	} catch (Exception $exception) {
		$result = 'Timeout';
	}
	return $result;
}
?>