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Online Sandbox for SQL and PHP: Write, Run, Test, and Share SQL Queries and PHP Code
<?php
$arr = [
'Ученик' => ['Иванов', 'Сидоров', 'Петров'],
'Учитель' => ['Васильев', 'Дмитриенко']
];
$person = 'Васильев';
if (in_array($person, $arr['Ученик'])) {
echo "$person is Ученик";
} elseif (in_array($person, $arr['Учитель'])) {
echo "$person is Учитель";
}
foreach ($arr as $position => $names) {
if (in_array($person, $names)) {
echo "$person is $position";
}
}