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  1. <?php
  2.  
  3. $name_alpha = array (
  4.     0 =>
  5.         array (
  6.             'ID' => 425,
  7.             'ln' => 'Bolware',
  8.             'fn' => 'Christian',
  9.             'mi' => '',
  10.         ),
  11.     1 =>
  12.         array (
  13.             'ID' => 423,
  14.             'ln' => 'Bernstein',
  15.             'fn' => 'Bear',
  16.             'mi' => 'D.',
  17.         ),
  18.     2 =>
  19.         array (
  20.             'ID' => 419,
  21.             'ln' => 'Bellweather',
  22.             'fn' => 'Brent',
  23.             'mi' => '',
  24.         ),
  25.     3 =>
  26.         array (
  27.             'ID' => 356,
  28.             'ln' => 'Bayleaf, III',
  29.             'fn' => 'Joe',
  30.             'mi' => 'X.',
  31.         ),
  32.     4 =>
  33.         array (
  34.             'ID' => 336,
  35.             'ln' => 'Public',
  36.             'fn' => 'John',
  37.             'mi' => 'Q.',
  38.         )
  39. );
  40.  
  41. usort($name_alpha, function($a, $b) {
  42.     return strcmp($a['ln'], $b['ln']) // will return this if it is not 0
  43.         ?
  44.         : strcmp($a['fn'], $b['fn']) // will return this if it is not 0
  45.             ?
  46.             : strcmp($a['mi'], $b['mi']);  // will return this if it made it this far
  47. });
  48.  
  49. print_r($name_alpha);
Success #stdin #stdout 0.01s 20520KB
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Array
(
    [0] => Array
        (
            [ID] => 356
            [ln] => Bayleaf, III
            [fn] => Joe
            [mi] => X.
        )

    [1] => Array
        (
            [ID] => 419
            [ln] => Bellweather
            [fn] => Brent
            [mi] => 
        )

    [2] => Array
        (
            [ID] => 423
            [ln] => Bernstein
            [fn] => Bear
            [mi] => D.
        )

    [3] => Array
        (
            [ID] => 425
            [ln] => Bolware
            [fn] => Christian
            [mi] => 
        )

    [4] => Array
        (
            [ID] => 336
            [ln] => Public
            [fn] => John
            [mi] => Q.
        )

)
https://ideone.com/wOmD53
language:
PHP (php 7.3.5)
created:
11 years ago
visibility:
public

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