CODEWITHSUNDEEP
phparrayssorting
Stark
Stark

Reputation: 593

Notice: undefined offset: 10, even with matching number of array keys?

I'm pretty much trying to separate all the returned values from preg_match_all, there are 3 values.

We get everything inside the strong tags, numbers into one array, text into another, and everything after the strong tags goes into the third, but I keep getting this error that I don't want to ignore.

This is the notice: Notice: Undefined offset: 10 on line 49, and it's $saveExtra = $matches[2][$key]; all the way at the bottom of the code.

$html = "<strong>1 1/4 lb.</strong> any type of fish
<strong>3 tsp.</strong> tarragon
<strong>3 tsp.</strong> tomato sauce
<strong>1 tbsp.</strong> coconut oil
<strong>Pepper and Salt</strong>, it's optional
<strong>2 tbsp.</strong> oil
<strong>1/4 cup</strong> cream
<strong>1/4 tsp.</strong> tarragon
<strong>1/4 tsp.</strong> tomato sauce
<strong>Salt and Pepper</strong>, it's optional too
";
$variations = array('lb', 'tsp', 'tbsp', 'cup');

$setInfo = [];
$arr_amount = [];
$extra_arr = [];
$arr_units = [];

if(preg_match_all("/<(?:strong|b)>(.*)(?:<\/(?:strong|b)>)(.*)/", $html, $matches)) {

    foreach($matches[1] as $amounts){
        preg_match_all("/^(?:[\p{Pd}.\/\s-]*[\d↉½⅓⅔¼¾⅕⅖⅗⅘⅙⅚⅐⅛⅜⅝⅞⅑⅒⅟])+/um", $amounts, $amount);
        preg_match_all('/[a-zA-Z :]+/m', $amounts, $unit);

        foreach($amount[0] as $amount_arr){
            $arr_amount[] = $amount_arr;
        }

        foreach($unit[0] as $units_rr){
            $arr_units[] = trim(strtolower($units_rr));
        }

        $unit_id = array();
        foreach($arr_units as $key => $unit_arr){
            foreach($variations as $unit_var){
                if(strtolower(trim($unit_arr)) == $unit_var){
                    $unit_id[] = $unit_var;
                }
            }

            if(str_word_count($unit_arr) >= 2){
                $arr_amount[$key] = '';
                $unit_id[$key] = '';


                $saveExtra =  $matches[2][$key];
                $matches[2][$key] = $unit_arr . $saveExtra;
            }

        }
    }
}

If we print_r($arr_amount, $unit_id, $matches[2]), we get:

Array
(
    [0] => 1 1/4
    [1] => 3
    [2] => 3
    [3] => 1
    [5] => 
    [6] => 2
    [7] => 1/4
    [8] => 1/4
    [9] => 1/4
    [10] => 
)
Array
(
    [0] => lb
    [1] => tsp
    [2] => tsp
    [3] => tbsp
    [5] => 
    [6] => tbsp
    [7] => cup
    [8] => tsp
    [9] => tsp
    [10] => 
)
Array
(
    [0] =>  any type of fish
    [1] =>  tarragon
    [2] =>  tomato sauce
    [3] =>  coconut oil
    [4] => , it's optional
    [5] => pepper and saltpepper and saltpepper and saltpepper and saltpepper and saltpepper and salt oil
    [6] =>  cream
    [7] =>  tarragon
    [8] =>  tomato sauce
    [9] => , it's optional too
    [10] => salt and pepper
)

I've been at this for the past 2 days without being able to figure out why I keep getting undefined offset when the $key is matching to that current iteration.

I've put the code up on eval, https://eval.in/883856

Upvotes: 0

Views: 373

Answers (1)

Oluwafemi Sule
Oluwafemi Sule

Reputation: 38982

The third item in $match (i.e $match[2]) is an array with 10 items. PHP arrays have zero-based index.

From my observation, $key at some point equals 10.

Add a guard clause against this like so before accessing $key in $match[2]:

if($key >= count($matches[2])) continue;

Upvotes: 1

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