Regex : Phone number starting with 06 or 07

Question

I have this function which works only for 10 digits.

function telValide( tel )
{
    var reg = new RegExp(\'^[0-9]{10}$\', \'i\');
    return reg.test(tel);
}
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Answer 1

The easiest pattern would probably be

^0[67]\d{8}$

i.e.

• 0
• 6 or 7
• a digit
• repeated exactly eight times

That assumes that your white space is merely for emphasis.

You could also be fancy and use a lookahead

^(?=0[67])\d{10}+$

This isn't really adding much expect complexity however.