Strings & VARCHAR. Do not try storing phone numbers as actual numbers. it will ruin the formatting, remove preceding 0s and other undesirable things. You may, if you choose to, restrict user inputs to just numeric values but even in that case, keep your backing persisted data as characters/strings and not numbers. Be aware of … Read more
Try this: preg_replace(‘/[^0-9]/’, ”, ‘604-619-5135’); preg_replace uses PCREs which generally start and end with a /.
It seems to me that you’re putting more effort into this than it warrants. Consider: If your purpose is to guard against mis-entered phone numbers, then you can probably catch well over 90% of them with just a very simple check. If your purpose is to try to force users to provide a valid number … Read more
You can resolve this using a lookahead assertion. Basically what we’re saying is I want a series of specific letters, (e, ex, ext, x, extension) followed by one or more number. But we also want to cover the case where there’s no extension at all. Side Note, you don’t need brackets around single characters like … Read more
In order to use this API you need to sign your app with entitlement com.apple.coretelephony.Identity.get with boolean value set to true.
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Not a good idea. What will you do for countries that have several different time zones and many area codes? There isn’t necessarily a one-to-one mapping of time zone to area code. For example, in the USA, the 928 area code covers much of Arizona, including two different time zones because in the north-eastern portion … Read more
You can use the TelephonyManager to do this: TelephonyManager tm = (TelephonyManager)getSystemService(TELEPHONY_SERVICE); String number = tm.getLine1Number(); The documentation for getLine1Number() says this method will return null if the number is “unavailable”, but it does not say when the number might be unavailable. You’ll need to give your application permission to make this query by adding … Read more
Assuming you don’t store things like the ‘+’, ‘()’, ‘-‘, spaces and what-have-yous (and why would you, they are presentational concerns which would vary based on local customs and the network distributions anyways), the ITU-T recommendation E.164 for the international telephone network (which most national networks are connected via) specifies that the entire number (including … Read more