PHP - copy certain array from multidimensional array to another new array

Question

I have this array:

Array ( 
[0] => Array ( [0] => b [1] => d [2] => c [3] =>a [4] => ) 

[1] => Array ( [0] => c [1] => a [2] => d [3] => [4] => ) 

[2] => Array ( [0] => b [1] => d [2] => a [3] => [4] => )

[3] => Array ( [0] => a [1] => d [2] => c [3] =>b [4] => )

)

and was wondering whether I can copy all inner array from it to another array where the first element is "b" so it looks like. Will the new array be reindexed when created? Thank you.

Array ( 
[0] => Array ( [0] => b [1] => d [2] => c [3] =>a [4] => ) 

[1] => Array ( [0] => b [1] => d [2] => a [3] => [4] => )

)

Paul Facklam · Accepted Answer · 2014-01-26 16:05:24Z

3

UPDATE: Had a little error in my code. Now it is fixed and working if you still need it.

$firstArray = array (array ('b', 'd', 'c', 'a'), 
                     array ('c', 'd', 'a', 'b'), 
                     array ('b', 'd', 'a', 'c'), 
                     array ('a', 'd', 'c', 'b'));

$secondArray = array();

foreach($firstArray as $sub) {

    if($sub[0] == 'b') {

        $secondArray[] = $sub;
    }
}

print_r($secondArray);

Output:

Array ( [0] => Array ( [0] => b [1] => d [2] => c [3] => a ) 
        [1] => Array ( [0] => b [1] => d [2] => a [3] => c ) )

edited Jan 26, 2014 at 16:05

answered Jan 26, 2014 at 15:07

Paul Facklam

1,64312 silver badges16 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

FartMachine4U Over a year ago

I was using: foreach($firstArray as $sub=>$value) and was checking for $value[0] instead of $sub[0], as well as $secondArray[] = $sub[0]; and was saving just the first element! $sub is really the full array! Doh! Appreciate it!

oleksii.svarychevskyi · Accepted Answer · 2014-01-26 15:14:50Z

2

function check($val) {
     return ($val[0] == 'b');
}
$secondArray = array_filter($firstArray, "check");

answered Jan 26, 2014 at 15:14

oleksii.svarychevskyi

1,1068 silver badges13 bronze badges

Collectives™ on Stack Overflow

PHP - copy certain array from multidimensional array to another new array

2 Answers 2

1 Comment

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

1 Comment

Comments

Your Answer

Sign up or log in

Post as a guest

Related