Regex for Mobile Number Validation

Question

I  want a regex for mobile number validation  The regex pattern should be such that it must accept   only in beginning and space or -  should be allowed only after country code only once   Only 10 digit number should be allowed after the country code  The country code should be optional  If country code doesn t exist  it should accept only 10 digit number  Regex should prevent any invalid number like  eg  91 0000000000 or 0000000000    The regex  should accept numbers like    1 8087339090  91 8087339090  912 8087339090 8087339090 08087339090  1-8087339090  91-8087339090  912-8087339090  918087677876 Country code 2 digits    10 digits Mobile Number   9108087735454 Country code 3 digits    10 digits Mobile Number    The regex should not accept numbers like     51 874645 double successive     71  84364356 double successive spaces   91 808 75 74 678 not more than one space   91 808-75-74-678 not more than one -   91-846363 80873 number less than 10 digit  8087339090456 number greater than 10 digit  0000000000 all zeros   91 0000000 all zeros with country code

User · Answer

This regex is very short and sweet for working.

`/^([+]\d{2})?\d{10}$/`

Ex: +910123456789 or 0123456789

-> /^ and $/ is for starting and ending
-> The ? mark is used for conditional formatting where before question mark is available or not it will work
-> ([+]\d{2}) this indicates that the + sign with two digits '\d{2}' here you can place digit as per country
-> after the ? mark '\d{10}' this says that the digits must be 10 of length change as per your country mobile number length

This is how this regex for mobile number is working.
+ sign is used for world wide matching of number.

if you want to add the space between than you can use the

`[ ]`

here the square bracket represents the character sequence and a space is character for searching in regex.
for the space separated digit you can use this regex

`/^([+]\d{2}[ ])?\d{10}$/`

Ex: +91 0123456789

Thanks ask any question if you have.

User · Answer

Try this regex         d 1 4   s-      0  s      d 10  s       Explanation of the regex using Perl s YAPE is as below   NODE                     EXPLANATION ----------------------------------------------------------------------   -imsx                  group  but do not capture  case-sensitive                            with   and   matching normally   with   not                          matching  n   matching whitespace and                            normally   ----------------------------------------------------------------------                            the beginning of the string ----------------------------------------------------------------------                            group and capture to  1  optional                             matching the most amount possible    ----------------------------------------------------------------------                                   optional  matching the most amount                              possible   ----------------------------------------------------------------------      d 1 4                   digits  0-9   between 1 and 4 times                               matching the most amount possible   ----------------------------------------------------------------------       s-                     any character of  whitespace   n   r                                t   f  and        -  ----------------------------------------------------------------------                            end of  1  NOTE  because you are using a                            quantifier on this capture  only the LAST                            repetition of the captured pattern will be                            stored in  1  ----------------------------------------------------------------------                            look ahead to see if there is not  ----------------------------------------------------------------------     0                         0   1 or more times  matching the most                              amount possible   ----------------------------------------------------------------------      s                       whitespace   n   r   t   f  and       1                              or more times  matching the most amount                              possible   ----------------------------------------------------------------------                                   optional  matching the most amount                              possible   ----------------------------------------------------------------------                              before an optional  n  and the end of                              the string ----------------------------------------------------------------------                            end of look-ahead ----------------------------------------------------------------------    d 10                    digits  0-9   10 times  ----------------------------------------------------------------------    s                       whitespace   n   r   t   f  and       0 or                            more times  matching the most amount                            possible   ----------------------------------------------------------------------                                 optional  matching the most amount                            possible   ----------------------------------------------------------------------                            before an optional  n  and the end of the                            string ----------------------------------------------------------------------                          end of grouping ----------------------------------------------------------------------

User · Answer

Satisfies all your requirements if you use the trick told below  Regex        d 1 3  -      d 10        start of line A   followed by  d  followed by a  or - which are optional  Whole point two is optional  Negative lookahead to make sure 0s do not follow  Match  d  10 times  Line end    DEMO Added multiline flag in demo to check for all cases  P S  You really need to specify which language you use so as to use an if condition something like below      true if above regex is satisfied and   amp  amp   it does not       match  0 s  5  or more times  if number match       d 1 3  -      d 10      amp  amp     number match  0 5

[regex] Regex for Mobile Number Validation

`/^([+]\d{2})?\d{10}$/`

`[ ]`

`/^([+]\d{2}[ ])?\d{10}$/`

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