如何在PHP中搜索数组中的字符串？

$array = array("apple", "banana", "cherry");
$search = "banana";

if (in_array($search, $array)) {
    echo "$search found in the array.";
} else {
    echo "$search not found in the array.";
}

$array = array("apple", "banana", "cherry");
$search = "banana";

$key = array_search($search, $array);

if ($key !== false) {
    echo "$search found at key $key.";
} else {
    echo "$search not found in the array.";
}

$array = array("apple", "banana", "cherry");
$search = "banana";

$result = array_filter($array, function($value) use ($search) {
    return strpos($value, $search) !== false;
});

if (!empty($result)) {
    echo "$search found in the array.";
} else {
    echo "$search not found in the array.";
}

$array = array("apple", "banana", "cherry");
$search = "banana";

$found = false;

foreach ($array as $value) {
    if ($value === $search) {
        $found = true;
        break;
    }
}

if ($found) {
    echo "$search found in the array.";
} else {
    echo "$search not found in the array.";
}