(PHP 8 >= 8.3.0)
str_decrement — Decrement an alphanumeric string
string
The input string.
Returns the decremented alphanumeric ASCII string.
A ValueError is thrown if string
is empty.
A ValueError is thrown if string
is not an alphanumeric ASCII string.
A ValueError is thrown if string
cannot be decremented. For example, "A"
or "0"
.
Example #1 Basic str_decrement() example
<?php
$str = 'ABC';
var_dump(str_decrement($str));
?>
The above example will output:
string(3) "ABB"
Example #2 str_decrement() example with a carry
<?php
$str = 'ZA';
var_dump(str_decrement($str));
$str = 'AA';
var_dump(str_decrement($str));
?>
The above example will output:
string(2) "YZ" string(1) "Z"