phparraysmultidimensional-arrayfilteringblacklist

Remove rows from a 2d array which have a column value found in a flat blacklist array

I have an array that I need to filter. I'd like to filter with an array of blacklisted words to have an new array without those banned 'words'.

[
    ['occurence' => 17, 'word' => 'sampleword'],
    ['occurence' => 14, 'word' => 'sampleword1'],
    ['occurence' => 14, 'word' => 'sampleword2'],
    ['occurence' => 14, 'word' => 'sampleword3'],
]

I have one function which works pretty well, but it only filters by one 'word'.

function words_not_included( $w ) {
   $not_included      = 'sampleword1';
   return $w['word'] != $not_included;
}

then I applied

$new_array = array_filter($old_array, "words_not_included");

So it works with one word.

How can I have an array of forbidden 'words' like:

$forbidden_words = ['sampleword1', 'sampleword3'];

and then filter with them and output an new array like this:

[
    ['occurence' => 17, 'word' => 'sampleword'],
    ['occurence' => 14, 'word' => 'sampleword2'],
]
Solution

  • With the existing code use in_array:

    function words_not_included( $w ) {
   $not_included = array('sampleword1', 'sampleword3');
   return !in_array($w['word'], $not_included);
}