Hi! Could we please enable some services and cookies to improve your experience and our website?
Online Sandbox for SQL and PHP: Write, Run, Test, and Share SQL Queries and PHP Code
<?php
$arr = [
'test' => ['users' => ['123']],
'test2' => ['users' => []]
];
//var_export($arr);
unset($arr['test']['users'][array_search('123', $arr['test']['users'])]);
var_export($arr);