如何用角度中的post方法传递数组值

Question

I want to pass array value with post method in angular to php

component.ts

onSubmit(orderid,username) {    
let orderdata = 
JSON.stringify(this.abc);

console.log(orderid);
this.orderservice.updatestatus(orderdata, +orderid,username).subscribe(
  res => {
    if (res.status === 'error') {          
    } else {
      //this.router.navigate(['/admin/block']);
      this.dialogRef.close();
    }
  },
  error => this.error = error
);
}

here this.abc is like [12,14,16]

service.ts

updatestatus(order, id: number,username: string) {    
return this.http.post<any>(this.serverUrl + 
'adminapi/update_order_ststus/' + id + '/' + username ,order)
  .pipe(
    catchError(this.handleError)
  );
}

in php i want to get this array value

$uaCheckbox = json_decode($this->input->post('order'));