使用正则表达式验证电话号码并支持多个号码

Question

I am not very experienced with regex and I need to validate phone numbers using javascript. I have a textbox which need to be allowed to accept multiple phone numbers with a delimiter of ';' and the characters that can be allowed for the phone numbers are

1. Numbers
2. '+'
3. '-'

Could someone help me on how I can acheive this using javascript and regex/ regular expressions?

Example:

+91-9743574891;+1-570-456-2233;+66-12324576

I tried the following:

^[0-9-+;]+$

Am not sure if this is correct.

Answer 1

You have placed - in wrong place so, your regex is not working.

Try this(your RegEx, but slightly modified):

^[0-9+;-]+$

or

^[-0-9+;]+$

To include a hyphen within a character class then you must do one of the following:

1. escape the hyphen and use \\- ,
2. place hyphen either at the beginning or at the end of the character class.

As the hyphen is used for specifying a range of characters. So, regex engine understands [0-9-+;]+ match any of the characters between 0 to 9 , 9 to + (all characters having decimal code-point 57 [char 9 ] to 43 [char + ] and it fails) and ; .

Answer 2

How about this ^([0-9\\-\\+]{5,15};?)+$

Explanation:

^          #Match the start of the line
[0-9\-\+]  #Allow any digit or a +/- (escaped)
{5,15}     #Length restriction of between 5 and 15 (change as needed)
;?         #An optional semicolon
+          #Pattern can be repeat once or more
$          #Until the end of the line

Only as restrictive as specified could be tighter, See it working here .

Answer 3

To be a bit more restrictive, you could use the following regexp:

/^\+[0-9]+(-[0-9]+)+(;\+[0-9]+(-[0-9]+)+)*$/

What it will match:

+91-9743574891
+1-570-456-2233;+66-12324576

What it won't match:

91-9743574891
+15704562233
6612324576

Answer 4

Your regex will match what you allow, but I would be a bit more restrictive:

^\+?[0-9-]+(?:;\+?[0-9-]+)*$

See it here on Regexr

That means match an optional "+" followed by a series of digits and dashes. Then there can be any amount of additional numbers starting with a semicolon, then the same pattern than for the first number.