crm/extend/wx/work/Externalcontact.php

<?php

namespace wx\work;

class Externalcontact extends Work
{
    public function __construct($corpid, $corpsecret)
    {
        parent::__construct($corpid, $corpsecret);
    }

    /**
     * 外部联系人openid转换
     * @param external_userid string 外部联系人userid
     * @return string openid
     */
    public function convertToOpenid($external_userid)
    {
        $url = 'https://qyapi.weixin.qq.com/cgi-bin/externalcontact/convert_to_openid?access_token='.$this->accessToken;
        $res = $this->curl($url, json_encode(['external_userid'=>$external_userid]));
        $res = json_decode($res, true);
        if (isset($res['errcode']) && $res['errcode'] != 0) {
            trace('外部联系人openid转换失败：'.$res['errmsg']);
            return null;
        }
    
        return $res['openid'];
    }


}