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@ 2015-03-16T14:40:31Z

<?php

class MyClass{

    public function writeit(){
        $input = array(
          array(
            'a'  => 'vmi',
            'tag_name' => 'google'
          ),
          array(
            'a'  => 'vmi2',
            'tag_name' => 'technology'
          )
        );
        
        echo "(".implode(', ', array_map("findentry", $input)).")";
    }
    
    private function findentry ($entry) {
      return $entry['tag_name'];
    }
}

$mc = new MyClass();
$mc->writeit();

Output
Performance
VLD
References
Branches

array_map: documentation ( source)
implode: documentation ( source)

preferences:dark modelive preview

48.62 ms | 402 KiB | 5 Q