How to Catch This Error: "Notice: Undefined Offset: 0"

How to catch this error: Notice: Undefined offset: 0

You need to define your custom error handler like:

<?php

set_error_handler('exceptions_error_handler');

function exceptions_error_handler($severity, $message, $filename, $lineno) {
  if (error_reporting() == 0) {
    return;
  }
  if (error_reporting() & $severity) {
    throw new ErrorException($message, 0, $severity, $filename, $lineno);
  }
}

$a[1] = 'jfksjfks';
try {
      $b = $a[0];
} catch (Exception $e) {
      echo "jsdlkjflsjfkjl";
}

Notice: Undefined offset: 0 foreach

This is what you got :

print_r($result_arr);

This give you this array :

Array ( 
    [Items] => 
        Array ( 
            [0] => Array ( 
                [SKU] => 123 
                [Quantity] => 13 
                [ProductName] => tet prod 
                [Description] => blah blah ... 

And this is what you do :

foreach ($result_arr[0]["http_response_body"]["Items"] as $key => $value) {

You get Notice: Undefined offset: 0just because as you can see there is no $result_arr[0] in your array.

So just do :

foreach ($result_arr["Items"] as $key => $value) {

And it should works !

Hope it helps

What is causing Undefined offset: 0 php

This line causes an error:

$result->results[0]

You need to check if $result->results has 0 key.

UPDATE:

To troubleshoot your problem you need to catch response that you do not expect:

$response = file_get_contents("https://maps.googleapis.com/maps/api/geocode/json?address={$address}&key=MY_API_KEY");
$result = json_decode($response);

try {
    $lat[] = trim($result->results[0]->geometry->location->lat);
    $lng[] = trim($result->results[0]->geometry->location->lng);
} catch (\Exeption $e) {
    var_dump($result);
}

When an exception occurs, you will see the response that causes your problem, and then you need to add a response format check based on what you received.

For example if you receive something like this:

{"results":[], "status": "ZERO_RESULTS"}

Your code should looks like this:

$response = file_get_contents("https://maps.googleapis.com/maps/api/geocode/json?address={$address}&key=MY_API_KEY");

$result = json_decode($response);

if(!empty($result->results)){
    $lat[] = trim($result->results[0]->geometry->location->lat);
    $lng[] = trim($result->results[0]->geometry->location->lng);
}

See also https://developers.google.com/maps/documentation/geocoding/intro

undefined offset PHP error

If preg_match did not find a match, $matches is an empty array. So you should check if preg_match found an match before accessing $matches[0], for example:

function get_match($regex,$content)
{
    if (preg_match($regex,$content,$matches)) {
        return $matches[0];
    } else {
        return null;
    }
}

Undefined offset: 0 - PHP Errors in Ajax Response

You need to properly initiate $counts as:

$counts = array(0,0);

because you are currently trying to increment a non-existent position:

// This doesn't work when position zero doesn't exist.
$counts[0] += $cart_item['quantity'];

Same thing applies to your $counts[1] += line.

Problems with arrays: Notice: Undefined offset: 0

Check Isset in your error line.
The isset () function is used to check whether a variable is set or not The isset() function return false if testing variable contains a NULL value.

   for($i = 0; $i < count($aDataTableDetailHTML); $i++)
    {
            for($j = 0; $j < count($aDataTableHeaderHTML); $j++)
            {
                if(isset($aDataTableDetailHTML[$i][$j])){
                    $aTempData[$i][$aDataTableHeaderHTML[$j]] = $aDataTableDetailHTML[$i][$j];
                }
            }
    }

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