PHP Sorting Inner, Inner Array

Question

Okay I have an array like this:

array {
    [0] => array {
               [0] => array {
                         ["Time"] => "01:00:00"
                      }
               [1] => array {
                         ["Time"] => "00:00:00"
                      }
    }
    [1] => array {
               [0] => array {
                         ["Time"] => "01:00:00"
                      }
               [1] => array {
                         ["Time"] => "00:00:00"
                      }
    }
}

Now what I want to do is sort the inner inner array (the one with the time values) by the time values. Just so that inner array is sorted by the time values. How would I do this?

I do have PHP 5.3 installed if that is helpful.

Answer 1

foreach ( $array as $key => &$part )
{
    usort( &$part, function( $a, $b ) {
        return strtotime($a['Time'])-strtotime($b['Time']) > 0;
    });
}

Answer 2

Try this:

$arr = array(array(array("Time" => "01:00:00"), array("Time" => "02:00:00"), array("Time" => "00:00:00")),
             array(array("Time" => "02:00:00"), array("Time" => "01:00:00"), array("Time" => "00:00:00")));

$c = count($arr);
for ($i = 0; $i < $c; $i++) {
    sort($arr[$i]);
}

var_dump($arr); // outputs desired array

Answer 3

function custom_map( $array ) {
    usort( $array, function( $a, $b ) {
        return strtotime($a['Time'])-strtotime($b['Time']) > 0;
    });
    return $array;
}

$new_array = array_map( "custom_map", $array );

http://se1.php.net/manual/en/function.usort.php

http://se1.php.net/manual/en/function.array-map.php

Answer 4

I don't think it gets any simpler to sort the second level -- iterate the first level and call sort() on each occurrence. Because your string are presumably hh:ii:ss , it is completely safe to compare them as simple strings (no need to strtotime() ).

Code: ( Demo )

$array = [
    [
        ['Time' => "01:00:00"],
        ['Time' => "00:00:00"]
    ],
    [
        ['Time' => "01:00:00"],
        ['Time' => "00:00:00"]
    ]
];

array_walk($array, 'sort');
var_export($array);

Output:

array (
  0 => 
  array (
    0 => 
    array (
      'Time' => '00:00:00',
    ),
    1 => 
    array (
      'Time' => '01:00:00',
    ),
  ),
  1 => 
  array (
    0 => 
    array (
      'Time' => '01:00:00',
    ),
    1 => 
    array (
      'Time' => '00:00:00',
    ),
  ),
)