<?php

$initialArray = [];
for ($i = 0; $i < 10000; $i++) {
    $data[] = [
        'Joe Bloggs',
        rand(0, 99999),
        'Manager',
        'Male',
        12
    ];
}

$data[] = [
    'Joe Bloggs',
    123456,/* id out of rand range */
    'Manager',
    'Male',
    12
];

$initialArray['data'] = $data;

//array_filter
function thatID($element)
{
    return $element[1] == 123456;
}

$start_time = microtime(true);
print_r(array_filter($initialArray['data'], 'thatID'));
$end_time = microtime(true);
$execution_time = ($end_time - $start_time);
echo " Execution time of array_filter script = " . $execution_time . " sec";


//foreach
$start_time = microtime(true);
foreach ($initialArray['data'] as $element) {
    if ($element[1] == 123456) {
        print_r($element);
    }
}
$end_time = microtime(true);
$execution_time = ($end_time - $start_time);
echo " Execution time of foreach script = " . $execution_time . " sec";


$start_time = microtime(true);
$key = array_search(123456, array_column($initialArray['data'], 1));
print_r($initialArray['data'][$key]);
$end_time = microtime(true);
$execution_time = ($end_time - $start_time);
echo " Execution time of array_search script = " . $execution_time . " sec";