Regex Match Within Range

Question

I need do a regex match for ASCII characters 32 - 90 inclusive.

I've attempted the following, however it doesn't seem to return anything.

preg_match("/^[\x20-\x5A]+$/u", $input)

The idea is that it is from hex 20 to hex 5a. I pulled these from http://www.asciitable.com/

I've got a spot for testing this on http://www.phpliveregex.com/p/2Dh

Ja͢ck · Accepted Answer · 2013-12-17 04:28:06Z

3

Your current range only supports upper case letters, so you need the /i modifier:

$input = 'adddd ### AAAA????';
preg_match('/^[\x20-\x5A]+$/i', $input); // int(1)

Alternatively, add the extra letters in the range:

preg_match('/^[\x20-\x5A\x61-\x7A]+$/', $input))

answered Dec 17, 2013 at 4:28

Ja͢ck

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6 Comments

AlexZ Over a year ago

My bad - I forgot the system I was developing for was A-Z not a-z, however I do want to support both.

AlexZ Over a year ago

Does the /i account for a-z also

Ja͢ck Over a year ago

@AlexZ Both parts of my answer account for lower case characters.

AlexZ Over a year ago

Thanks @Jack, the second option seems more readable for future reference, as the /i may easily be skipped.

AlexZ Over a year ago

I notice laravel use github.com/laravel/framework/blob/master/src/Illuminate/… the /u does this account for uppercase I assume?

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Scuzzy · Accepted Answer · 2013-12-17 04:18:42Z

-1

You need to use preg_match's third parameter to assign it to a variable

preg_match("/^[\x20-\x5A]+$/u", $input, $matches)

The standard return of this function is a 1 or 0/FALSE

eg...

if(preg_match("/^[\x20-\x5A]+$/u", $input, $matches))
{
  var_dump($matches);
}

answered Dec 17, 2013 at 4:18

Scuzzy

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2 Comments

AlexZ Over a year ago

This doesn't seem to work either sandbox.onlinephpfunctions.com/code/…

Scuzzy Over a year ago

But those are outside of your ASCII range, try it with uppercase JONES 1234 or change your hexadecimal values to extend it to lower case characters

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