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up vote 2 down vote favorite

I'm a novice at PHP and I need a quick solution to the following problem but can't seem to come up with one:

I have a multi-dimensional array like so

Array
(
    [0] => Array
        (
            [blogTags_id] => 1
            [tag_name] => google
            [inserted_on] => 2013-05-22 09:51:34
            [inserted_by] => 2
        )

    [1] => Array
        (
            [blogTags_id] => 2
            [tag_name] => technology
            [inserted_on] => 2013-05-22 09:51:34
            [inserted_by] => 2
        )
)

I want to use the implode() to somehow return a comma-separated string containing values of tag_name key like so. 

google, technology

Is it possible to achieve this effect with the said function? If not then please suggest an alternate solution.

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3 Answers

up vote 4 down vote accepted

Quite simple:

<?php
$input = array(
  array(
    'tag_name' => 'google'
  ),
  array(
    'tag_name' => 'technology'
  )
);

echo implode(', ', array_map(function ($entry) {
  return $entry['tag_name'];
}, $input));

http://codepad.viper-7.com/rywdSF

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up vote 2 down vote 
join(',', array_map(function (array $tag) { return $tag['tag_name']; }, $array))
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up vote 0 down vote

Try this 

 $str;
 foreach ($arrays as $arr) {
     $str .= $arr["tag_name"] . ",";
 }
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