获取和删除字符串的第一个字符

string = "hello"
first_char = string[0]

string = "hello"
remaining_chars = string[1:]

let string = "hello";
let first_char = string.charAt(0);

let string = "hello";
let remaining_chars = string.slice(1);

String string = "hello";
char first_char = string.charAt(0);

String string = "hello";
String remaining_chars = string.substring(1);

string str = "hello";
char first_char = str[0];

string str = "hello";
string remaining_chars = str.Substring(1);

$string = "hello";
$first_char = $string[0];

$string = "hello";
$remaining_chars = substr($string, 1);