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phpmultidimensional-arrayimplode

Multidimensional Array PHP Implode

In terms of my data structure, I have an array of communications, with each communications_id itself containing three pieces of information: id, score, and content.

I want to implode this array in order to get a comma separated list of ids, how do I do this?

Solution

  • Update for PHP 5.5

    PHP 5.5 introduces array_column which is a convenient shortcut to a whole class of array_map usage; it is also applicable here.

    $ids = array_column($communications, 'id');
$output = implode(',', $ids);

    Original answer

    You need to make an array of just ids out of your array of communications. Then the implode would be trivial.

    Hint: the function for that is array_map.

    Solution:

    Assumes PHP 5.3, otherwise you 'd have to write the callback as a string.

    $ids = array_map(function($item) { return $item['id']; }, $communications);
$output = implode(',', $ids);