str_decrement

(PHP 8 >= 8.3.0)

str_decrement — Decrement an alphanumeric string

Description

str_decrement ( string


         $string

): string

Returns the decremented alphanumeric ASCII string .

Parameters

string: The imput string.

Return Values

Returns the decremented alphanumeric ASCII string.

Errors/Exceptions

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" .

Examples

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
            
            
             =
            
            
             'ÇA'
            
            
             ;
             

            
            
             var_dump
            
            
             (
            
            
             str_decrement
            
            
             (
            
            
             $str
            
            
             ));
             

             

            
            
             $str
            
            
             =
            
            
             'AA'
            
            
             ;
             

            
            
             var_dump
            
            
             (
            
            
             str_decrement
            
            
             (
            
            
             $str
            
            
             ));
             

            
            
             ?>

The above example will output:

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

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