Replace using Regular Expression

$string = 'Thank you for calling 555-5757 your order total is $123.32'
$string -Replace "[0-9]","0"

Details

Use the -Replace to Replace String using a regular expression

Example

PS C:\> $string = 'Thank you for calling 555-5757 your order total is $123.32'
>> $string -Replace "[0-9]","0"

Thank you for calling 000-0000 your order total is $000.00

| regex replace string