3v4l.org

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<?php $input = array( array( 'tag_name' => 'google', 'dsddsdsd'=>'dsdsdsd' ), array( 'tag_name' => 'technology', 'wqwqw'=>'qwwqw' ) ); echo implode(', ', array_map(function ($entry) { return $entry['tag_name']; }, $input));

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