<?php
$database = new mysqli("localhost", "тебя ебёт?", "тебя ебёт?", "тебя ебёт?");
if (mysqli_connect_errno() || empty($_POST["username"])) {
die();
}
$query = mysqli_query($database, "SELECT * FROM users WHERE username LIKE '{$_POST[username]}'");
$result = array();
if (mysqli_num_rows($query) > 0) {
while ($row = $query->fetch_row()) {
$result["username"] = $row[0];
}
}
else {
die();
}
echo json_encode($result);
?>