PHP：如何获取特定关联数组键值的字符长度

Question

我需要获得字符长度“ fsdfsdf”。 谁能帮我？ :)

$array = array(
    'Firstname' => $wpdb->escape($_REQUEST['Firstname']),
    'Lastname' => $wpdb->escape($_REQUEST['Lastname']),
    'Phone' => $wpdb->escape($_REQUEST['Phone']),
    'Email' => $wpdb->escape($_REQUEST['Email'])
);

的print_r（$阵列）：

Array
(
    [Firstname] => fsdfsdf
    [Lastname] => 
    [Phone] => 
    [Email] =>
)

Answer 1

$char_length = strlen($array['Firstname']);

Answer 2

尝试这个，

$length =   strlen($array[Firstname]);
echo $length;

Answer 3

希望对您有帮助，

 echo strlen(trim($array['Firstname']));