致命错误：找不到此类ID-API响应（PHP）

Question

I am trying to get all infos from an API, where I dont know every single ID the API can get me. So basically I am calling for 1 info after another while I increase the ID:

<?php

$i = 0;
while ($i < 1000)
{
    if ($api->traits()->get($i) == "Uncaught no such id")
    {
        echo "do something";
        $i++;
    }
    else
    {
        echo "do something else";
        $i++;
    }
}

My error code:

Fatal error: Uncaught no such id (status: 404; url:....)

Is there a way that the program doesn't stop on a Fatal error? Or that it reboot the script on fatal error with one higher ID?

Answer 1

I believe you're seeing an Uncaught Exception . See the catch block? That's what it means by "uncaught".

Try this:

<?php
$i = 0;
while ($i < 1000)
{
    try
    {
        $trait = $api->traits()->get($i);
    }
    catch (Exception $ex)
    {
        echo "Error: " . $ex->getMessage();
        echo "(do something else)";

        $i++;
        continue;
    }


    echo "found trait " . $trait;
    $i++;
}

Also, this is probably a situation where you should use a for loop instead of a while loop.

<?php
for ($i = 0; $i < 1000; $i++)
{
    try
    {
        $trait = $api->traits()->get($i);
    }
    catch (Exception $ex)
    {
        echo "Error: " . $ex->getMessage();
        echo "(do something else)";

        continue;
    }


    echo "found trait " . $trait;
}

I should also add that Exception is the very base type or class of exception, and APIs and libraries will typically throw a more specific type of exception.

catch (Exception $ex) { ... }

will catch any type of exception, but

catch (HttpConnectionException $ex) { ... }

would only catch an Exception of type HttpConnectionException . This allows you to handle specific types of errors differently. You can use get_class($ex) to see what exact type of Exception the API is throwing if you like.