Create date array from two dimensional array in PHP

Question

I have an array like,

 $my_array=array(array('month'=> 3,
                       'day'=> 4,
                       'hour' => 1,
                       'minut' => 15,
                       'year'=> 2014),
                    array('month'=> 5,
                       'day'=> 7,
                       'hour' => 1,
                       'minut' => 50,
                       'year'=> 2012)
                       ----------
                        );

I want to create a new array from this array like,

$new_array=array('2014-3-4 1:15','2012-5-7 1:50');

I know it is possible with traversing each element with a loop,Is there any easy way?.because my array contain large number(more than 50000) of data.

dfsq · Accepted Answer · 2014-03-04 07:08:31Z

2

Try something like this using array_map:

$newArr = array_map(function($d) {
    return $d['year'] . '-' . $d['month'] . '-' . $d['day'] . ' ' . $d['hour'] . ':' . $d['minut'];
}, $my_array);

answered Mar 4, 2014 at 7:08

dfsq

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Realitätsverlust · Accepted Answer · 2014-03-04 07:09:02Z

1

Ofc its possible:

foreach($my_array as $k => $v) {
    $new_array[i] = $v["year"]."-".$v["month"]."-".$v["day"]." ".$v["hour"].$v["minut"];
    i++;
}

//Untested

answered Mar 4, 2014 at 7:09

Realitätsverlust

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2 Comments

Shijin TR Over a year ago

I know this method.But my array is too large.it will timeout before foreach

Realitätsverlust Over a year ago

de1.php.net/set_time_limit should do it. Dont forget to give the user feedback that the script is still working.

Alma Do · Accepted Answer · 2014-03-04 07:10:36Z

1

You may use array_map(), but, please, note: this will use loop internally.

$result = array_map(function($x)
{
   return $x['year'].'-'
         .$x['month'].'-'
         .$x['day'].' '
         .$x['hour'].':'
         .$x['minut'];
}, $my_array);

So, this won't increase overall performance. Also it won't check your dates. I recommend to use mktime() and date() so you'll be able to result in any date format. Or may be use checkdate() if you'll need to check if element contains valid date (btw, good alternative to those functions is DateTime API)

The only good thing about plain concatenation is that is will be a little bit faster (because in case of using date functions there will be overhead, obviously).

answered Mar 4, 2014 at 7:10

Alma Do

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