How to return information in the middle of PHP chain calls

Question

How to get error information when there is an error in PHP chain call

The error message here is not a simple string. For example, during the chain call process, a certain function may need to return an array when it does not meet a certain condition, and directly report an error, saying that the array cannot call the next function, but how? Is it possible to stop calling further when a certain function in the middle returns?

Answer 1

try catch

Answer 2

Is it like this below?

<?php

class Demo
{
    protected $result;
    protected $error = false;
    
    function funcA() 
    {
        if (! $this->error) {
            //do xxx
        }
        
        return $this;
    }
    
    function funcB() 
    {
        if (! $this->error) {
            //do xxx
            //模拟发生错误
            $this->error = true;
            $this->result = ['Ops!', 'Something bad Happened!'];
        }
        
        return $this;
    }
    
    function funcC() 
    {
        if (! $this->error) {
            //do xxx
        }
        
        return $this;
    }
    
    function GetResult() {
        return [$this->result, $this->error];
    }
}

$demo = new Demo();

list($result, $hasError) = $demo->funcA()->funcB()->funcC()->GetResult();

var_dump($result, $hasError);

PS: It feels like writing golang

Play online https://glot.io/snippets/ereygerdv3

Answer 3

throw new \Exception('error');