Question

I’m using USAePay’s [horrible] PHP library to connect to their gateway, but I’m getting the following error:

Deprecated: Function ereg_replace() is deprecated in …/usaepay.php on line 320

This corresponds to the following line:

$this->amount = ereg_replace("[^[:digit:].]", "", $this->amount);

So, I’d like to switch it out with preg_replace.
Here’s what I’m thinking:

$this->amount = ereg_replace("/[^[\d].]/", "", $this->amount);

Is this equivalent to the one above, or not?

Answer 1

You want to delete any non-digit or non-period character from the string that represents an amount. You can do:

$this->amount = preg_replace("/[^\d.]/", "", $this->amount);

Regex used:

[   - Start of character class
 ^  - Negation
 \d - any digit
 .  - a literal perios
]   - end of character class