phone number validation and formatting utility - #1185
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Description
This pull request introduces a crucial new utility function, validate_and_format_phone(), aimed at standardizing and cleaning up phone numbers. The goal is to get messy, user-provided phone numbers into a single, reliable format: the E.164 international standard (e.g., +15551234567).
Why this is a big deal:
Think about how often you see phone numbers entered in different ways—with dashes, parentheses, or just local digits. In any application that sends SMS messages, uses APIs, or stores contact information, these inconsistent formats are a recipe for bugs. This tool is designed to be the first line of defense against that problem, making sure all phone numbers are clean and consistent before they're used or stored in a database.
What the code does:
The function uses a few simple steps to get the job done:
It strips out all non-digit characters, but smartly keeps a leading + if it exists.
It handles cases where a country code is missing by automatically prepending a configurable default (like +1 for the US and Canada).
It includes a basic sanity check to ensure the final number has a realistic length, filtering out clearly invalid entries.
In short, it's a small but mighty piece of code that solves a very common, frustrating problem for developers.