Online PHP editor | output for ide7a

@ 2021-03-25T08:09:28Z

<?php
$array = [
    "one"   => ["id" => 111, "name" => "Jhon"],
    "two"   => ["id" => 222, "name" => "Adam"],
    "three" => ["id" => 111, "name" => "Mark"],
    "four"  => ["id" => 125, "name" => "Jhon"],
    "five"  => ["id" => 111, "name" => "Jhon"],
    "six"   => ["id" => 222, "name" => "Rock"],
];

// store added IDs
$added = [];

// filter array (need to pass $added as reference to be updated)
$output = array_filter($array, function($item) use (&$added) 
{
    // shortcut for readability
    $id = $item['id'];  
    // Check if id already exists
    if (isset($added[$id])) { return false; } 
    // add to reference
    $added[$id] = true; 
    // add to final array
    return true; 
});

unset($added); // no longer needed.

var_dump($output);

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 - 8.3.25, 8.4.1 - 8.4.13: array(3) { ["one"]=> array(2) { ["id"]=> int(111) ["name"]=> string(4) "Jhon" } ["two"]=> array(2) { ["id"]=> int(222) ["name"]=> string(4) "Adam" } ["four"]=> array(2) { ["id"]=> int(125) ["name"]=> string(4) "Jhon" } }
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(3) { ["one"]=> array(2) { ["id"]=> int(111) ["name"]=> string(4) "Jhon" } ["two"]=> array(2) { ["id"]=> int(222) ["name"]=> string(4) "Adam" } ["four"]=> array(2) { ["id"]=> int(125) ["name"]=> string(4) "Jhon" } }

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