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@ 2017-04-19T07:19:49Z

<?php

$arr = array (
    0 => array(
        0 => "a"
        ),
    1 => array(
        0 => "b",
        1 => "c"
        ),
    "a" => array(
       "b" => "d"
       )
    );
    echo "<pre>"; print_r($arr);
    foreach($arr as $key=>$val){
        if(is_array($val) && count($val) == 1){
           $arr[$key] = array_shift($val); 
        }
    }
      echo "<pre>"; print_r($arr);

Output
Performance
VLD
References
Branches

print_r: documentation ( source)
array_shift: documentation ( source)

preferences:dark modelive preview

56.53 ms | 402 KiB | 5 Q