str_decrement()函式—用法及示例

適用php版本(PHP 8 >= 8.3.0)

str_decrement — 遞減字母數字字串

說明

str_decrement(string $string): string

<?php
$str = 'ABC';
var_dump(str_decrement($str));
?>

string(3) "ABB"

<?php
$str = 'ZA';
var_dump(str_decrement($str));

$str = 'AA';
var_dump(str_decrement($str));
?>

string(2) "YZ"
string(1) "Z"