Online PHP editor | output for BEGKT

@ 2021-04-13T06:52:42Z

<?php

$users = [
    ['first_name' => 'Bob', 'last_name' => 'Smith'],
    ['first_name' => 'Steve', 'last_name' => 'Little'],
    ['first_name' => 'Eric', 'last_name' => 'Fielder'],
    ['first_name' => 'Steve', 'last_name' => 'Richardson'],
    ['first_name' => 'Bob', 'last_name' => 'Sanders'],
    ['first_name' => 'Bob', 'last_name' => 'Sanders'],
    ['first_name' => 'Bob', 'last_name' => 'Smith'],
];

foreach ($users as $row) {
    $grouped[$row['first_name']][$row['last_name'][0] ?? ''][$row['last_name']][] = $row;
}

$result = [];
foreach ($grouped as $firstName => $leadingLetterGroup) {
    $leadingLetterCount = count($leadingLetterGroup);
    foreach ($leadingLetterGroup as $leadingLetter => $lastNameGroup) {
        $lastNameCount = count($lastNameGroup);
        foreach ($lastNameGroup as $lastName => $rows) {
            if (count($rows) === 1) {
                if ($leadingLetterCount === 1) {
                    $username = $firstName;
                } elseif ($lastNameCount === 1) {
                    $username = "$firstName $leadingLetter.";
                } else {
                    $username = "$firstName $lastName";
                }
                $result[] = $rows[0] + ['username' => $username];
            } else {
                foreach ($rows as $i => $row) {
                    $username = sprintf("%s %s (%d)", $firstName, $lastName, $i + 1);
                    $result[] = $row + ['username' => $username];
                }
            }
        }
    }
}
var_export($result);

Output for 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.4, 8.3.6 - 8.3.27, 8.4.1 - 8.4.14: array ( 0 => array ( 'first_name' => 'Bob', 'last_name' => 'Smith', 'username' => 'Bob Smith (1)', ), 1 => array ( 'first_name' => 'Bob', 'last_name' => 'Smith', 'username' => 'Bob Smith (2)', ), 2 => array ( 'first_name' => 'Bob', 'last_name' => 'Sanders', 'username' => 'Bob Sanders (1)', ), 3 => array ( 'first_name' => 'Bob', 'last_name' => 'Sanders', 'username' => 'Bob Sanders (2)', ), 4 => array ( 'first_name' => 'Steve', 'last_name' => 'Little', 'username' => 'Steve L.', ), 5 => array ( 'first_name' => 'Steve', 'last_name' => 'Richardson', 'username' => 'Steve R.', ), 6 => array ( 'first_name' => 'Eric', 'last_name' => 'Fielder', 'username' => 'Eric', ), )
Output for 8.3.5: Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 array ( 0 => array ( 'first_name' => 'Bob', 'last_name' => 'Smith', 'username' => 'Bob Smith (1)', ), 1 => array ( 'first_name' => 'Bob', 'last_name' => 'Smith', 'username' => 'Bob Smith (2)', ), 2 => array ( 'first_name' => 'Bob', 'last_name' => 'Sanders', 'username' => 'Bob Sanders (1)', ), 3 => array ( 'first_name' => 'Bob', 'last_name' => 'Sanders', 'username' => 'Bob Sanders (2)', ), 4 => array ( 'first_name' => 'Steve', 'last_name' => 'Little', 'username' => 'Steve L.', ), 5 => array ( 'first_name' => 'Steve', 'last_name' => 'Richardson', 'username' => 'Steve R.', ), 6 => array ( 'first_name' => 'Eric', 'last_name' => 'Fielder', 'username' => 'Eric', ), )

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