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admin | Category: Reverse Phone Lookup For Free | 21.12.2014
Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Perhaps you just copied and pasted your code wrong, but it looks like you have an infinite loop in your while block.
Can you provide some samples of phone numbers that you are expecting to match, but are failing?
Not the answer you're looking for?Browse other questions tagged javascript internet-explorer replace innerhtml highlighting or ask your own question.
If async-await doesn't create any additional threads, then how does it make applications responsive? Why does Uncle Bob suggest that coding standards shouldn't be written down if you can avoid it?
I have a website form that requires a US phone number input for follow up purposes, and this is very necessary in this case. However I am considering checking the number against a set of rules to just try to narrow down the junk phone numbers received.
Would this result in any situations that you can think of that would not allow a user to enter their phone number? 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 whether they want to give that information out or not, then you've taken on a hopeless task - even if you were able to access 100% accurate, up-to-the-second telco databases to verify that the exact number entered is currently live, you still don't gain any assurance that the number they gave you is their own. Either way, a simple test is going to get you good results and going into more complex rule sets will take up increasingly more time while providing increasingly little benefit to you (while also potentially adding false positives, as already shown with the "seven of the same digit" and 867-5309 cases). If you can verify the area code then unless you really, really need to know their phone number you're probably doing as much as is reasonable. And this would explain the joke for our non-US readers and those who cannot remember the 1980's. In Django there is a nice little contrib package called localflavor wich has a lot of country specific validation code, for example postal codes or phone numbers.
Also, 123-1234 or 123-4567 are only invalid numbers because the prefix begins with a 1, but 234-5678 or 234-1234 would actually be valid (though it looks fake).
You also need to take into account ten-digit dialing, which is used in some areas now: this is different from long-distance dialing (ie, 303-555-1234, as opposed to 1-303-555-1234).

Those parameters look pretty good to me, I might also avoid numbers starting with 911 just to be safe. I don't nkow if this is the right place, it's a formatting function rather than a validation function, I thought let's share it with the community, maybe one day it will be helpful..
The regex you provided in your question (^[0-9]$) will only match a one digit phone number.
Not the answer you're looking for?Browse other questions tagged php regex or ask your own question. Would an encryption scheme that generates an extra key to be securely stored offsite be a safe backdoor? Is there any point in unit testing a client service that simply passes through data from the server?
As noticed by user Simon Weaver below, if you are also interested in matching on unformatted numbers just make the separator character class optional as [\s.-]? Do you think that the question mark is not necessary in (?\d{3}) part of your very first line ? Regardless of the way the phone number is entered, the capture groups can be used to breakdown the phone number so you can process it in your code. To make the Area Code optional, just add a question mark after the (\d{3}) for the area code.
Note that, depending on the language and brand of regexes used, you might need to put \2 instead of $2 or such matching might not be supported at all. Not the answer you're looking for?Browse other questions tagged regex pattern-matching or ask your own question. Fill in your email and check this box if you expect a reply from Jeffrey and don't want to keep checking the comments manually. Can you post the HTML of the page you're trying to manipulate, as well as what you what the end HTML result to be after your manipulation? First, if a child is not node type 3 and not a SCRIPT node, you re-call recursivetree() but you do not pass the child in. You're trying to replace a node with a string, which just won't work, and I think you mean to replace any matching numbers within that node, rather than the entire node. If you're trying to loop through the entire page and replace all instances of numbers, just do a replace on the body.

If you want to highlight phone numbers, you're going to have to modify the original content in some way.
If you need international number validation as well, it'd be more than a bit more complicated. Depending on your language you can call a function that will return true if a supplied phone number matches the expression.
I have made following regex, but I also need to it to accept numbers starting with plus char, how can I do that?
Just because a problem has already been solved doesn't mean one should give up on the learning opportunity it presents.
So here I think the second question mark right before the digt is checking for digit and not the parenthesis. For my purpose, the \s at the beginning and end are not needed, because I'm using for validation, and the field is trimmed already. I haven’t touched a floppy disk in at least 17 years… Thanks for the blast from the past! When there are no further child nodes found, it loops out i.e it reaches a text node causing the loop to end. I have seen some options of third parties that validate phone numbers for you, however idk if that is the best option for this situation. Since phone numbers generally need to be more than 3 characters anyway, what do you think about ^\+?\d{4,}$ which is simpler and covers all the bases?
I stacked the computers in a column and moved floppy disk 1 from the top computer to the next when it was done and start disk 2 on the top. However if you have every used one of these third parties and can make a recommendation that would also be greatly appreciated here. The code runs as per above info, but when I try to match TEXT_NODE (console.log() outputs all text node), replace() is used to identify phone numbers using regex and replaced with hyperlink.

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