<?php
namespace Westdc\Helpers;

class Tools {

    /**
     * 判断是否为UUID字符串
     * @param $uuid
     * @return int
     */
	public static function isUUID($uuid) {
		return preg_match("/^[0-9A-Za-z]{8}-[0-9A-Za-z]{4}-[0-9A-Za-z]{4}-[0-9A-Za-z]{4}-[0-9A-Za-z]{12}$/",$uuid);
	}

    /**
     * @param $str
     * @return bool
     */
    public function isEmail($str){
        return true;
    }

    /**
     * @param $cmd
     */
    public function execBackend($cmd)
    {
        if (substr(php_uname(), 0, 7) == "Windows"){
            pclose(popen("start cmd /c ". $cmd, "r"));
        }
        else {
            exec($cmd . " > /dev/null &");
        }

        return;
    }

    /**
     * 返回的汉语文字信息在windows中是GB2312编码，需要手动改成UTF8
     *  iconv("GB2312","UTF-8",$read);
     * @param $cmd
     * @return array
     */
    public function execFront($cmd)
    {
        $response = array();
        $handle = popen("$cmd 2>&1", 'r');
        $read = '';
        while ($read = fread($handle, 20096)) {
            $response[] = trim($read);
        }
        pclose($handle);
        flush();

        return $response;
    }
	
	
}