Validate an Irish mobile phone number

Question

I want to validate an Irish mobile phone number in the format xxx-xxxxxxx. The first three digits should be 083, 086, 087, or 089. The next seven digits should be integer numbers.

I tried using this HTML5 validation pattern:

<input type="text" id="phone_no" name="owner[phone]" value="" pattern="([0]{1}[8]{1}[3|6|7|9]{1}[0-9]{7})">

The code is not working. How can I validate this information?

Answer 1

sorry modify this

function is_phone_number($PhoneNumber)
{
    $formats = array
    (
        '### ## # ### ###', //[phone]
        '############', //265123456789
        '##########', //123456789
        '### # ### ###' //012 3 456 789
    );
    $format = trim(preg_replace('/[0-9]/', '#', $PhoneNumber));
    return (in_array($format, $formats)) ? true : false;
} 

Answer 2

fairly old post but this might help anyone still looking for this

/^\s*((\(?(0)\s?8[35679]\)?\s?\d{3}\s?\d{4}))\s*$/

Answer 3

Anything you put in square brackets translates to "any of these characters".

So 1[abcde]2 is the same as 1(a|b|c|d|e)2

Also, by default a single letter has size one. So [x]{1} is the same as x.

And [0-9] is the same as a digit, which can be expressed as \d

Try this regex, it's easier to understad:

08[3679]-\d{7}