go - Regex Phone Number Using Validation V2 Golang Package Not Working -

i having trouble when using github.com/go-validator/validator validate regex phone numbers prefix +62, 62, 0, instance number e.g. +628112blabla, 0822blablabla, 628796blablabla.

i have try regex on online regex tester , no issue regex on that. here regex :

(0|\+62|062|62)[0-9]+$ 

but when try go implement it, regex not working. code implement purpose :

type paramrequest struct {     phonenumber string `validate:"nonzero,regexp=(0|\+62|062|62)[0-9]+$"`     itemcode    string `validate:"nonzero"`     callbackurl string `validate:"nonzero"` }  func (c *topupalloperatorapicontroller) post() {     var v models.topupalloperatorapi      interf := make(map[string]interface{})      json.unmarshal(c.ctx.input.requestbody, &interf)      logs.debug(" json input request ", interf)     var phone, item, callback string      if _, := interf["phonenumber"].(string); {         phone = interf["phonenumber"].(string)     }     if _, b := interf["itemcode"].(string); b {         item = interf["itemcode"].(string)     }      if _, c := interf["callbackurl"].(string); c {         callback = interf["callbackurl"].(string)     }      ve := paramrequest{         phonenumber: phone,         itemcode:    item,         callbackurl: callback,     }      logs.debug(" param request ", ve)        err := validator.validate(ve)     if err == nil {        //success     }else{       // not success     } 

many help. thank you.

because using regexp check phonenumber won't matching if value empty better remove nonzero validation.
have checked out documentation , haven't found examples can use both: nonzero , regexp.
need make regex symbol-escaped, otherwise won't detected reflection. means should use (0|\\+62|062|62)[0-9]+$ in code. here example problem is: symbol escaping in struct tags
, also, please try use regexp: ^\\+{0,1}0{0,1}62[0-9]+$