language: PHP (php 5.4.4)
date: 443 days 17 hours ago
link:
visibility: public 
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<?php
    $a = array();
    $b = implode(',',$a); // ""
    var_dump($b);
 
    $a = array('foo');
    $b = implode(',',$a); // "foo";
    var_dump($b);
 
    $a = array('foo','bar');
    $b = implode(',',$a); // "foo,bar";
    var_dump($b);