Regular Expressions 101

Explanation

Pro

^start of line

Negative Lookahead(?!(.*\+){2})

Group 1(.*\+){2}

{2}repeats the group contents below exactly 2 times:

.*any character (except for line terminators), repeated any number of times

\+the literal + (43₁₀ / 53₈ / 2B₁₆)

Negative Lookahead(?!(.*-){2})

Group 2(.*-){2}

{2}repeats the group contents below exactly 2 times:

.*any character (except for line terminators), repeated any number of times

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Negative Lookahead(?!(.*\*){2})

Group 3(.*\*){2}

{2}repeats the group contents below exactly 2 times:

.*any character (except for line terminators), repeated any number of times

\*the literal * (42₁₀ / 52₈ / 2A₁₆)

Character Class[0-9*+-]+

+matches at least one character from the set below:

0-9one character from 0 (48₁₀) to 9 (57₁₀)

*the literal * (42₁₀ / 52₈ / 2A₁₆)

+the literal + (43₁₀ / 53₈ / 2B₁₆)

-the literal - (45₁₀ / 55₈ / 2D₁₆)

$end of line

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

Match Information

Detailed match information will be displayed here automatically.

Quick Reference

25 tokens

Regular Expression

^(?!(.*\+){2})(?!(.*-){2})(?!(.*\*){2})[0-9*+-]+$

New



+9720545455454

056565656345

03-43434344

0546-4234234

*9090

+97203-0656534

Meaning, I don't want to allow the user to gibberish everything together, like:

+954-4343+3232*4343+-

+-4343-+5454+9323+234

Substitution



+9720545455454

056565656345

03-43434344

0546-4234234

*9090

+97203-0656534

Meaning, I don't want to allow the user to gibberish everything together, like:

+954-4343+3232*4343+-

+-4343-+5454+9323+234