PHP8 新特性 match 表达式详解

function convert($input) {
    switch ($input) {
        case "true":
            $result = 1;
        break;
        case "false":
            $result = 0;
        break;
        case "null":
            $result = NULL;
        break;
    }
    return $result;
}

function converti($input) {
    return match($input) {
        "true" => 1,
        "false" => 0,
        "null" => NULL,
    };
}

return match($input) {
    "true", "on" => 1,
    "false", "off" => 0,
    "null", "empty", "NaN" => NULL,
};

$input = "2 person";
switch ($input) {
    case 2:
        echo "bad";
    break;
}

function convert($input) {
    return match($input) {
        "true" => 1,
    };
}
convert("false");

Fatal error: Uncaught UnhandledMatchError: Unhandled match value of type string