PHP Regex validate letters and Spanish accent

Question

How can I add/improvised my code so Spanish accent will be considered as valid in addition to normal alphabet (a-z)

I have the following in my code

public static function IsAlpha($s){
  $reg = "#[^a-z\s-]#i";
  $count = preg_match($reg, $s, $matches);
  return $count == 0;
}

Potentially duplicate question has the answer: [PHP: PREG: How to match special chars like a grave?](http://stackoverflow.com/questions/2133758/php-preg-how-to-match-special-chars-like-a-grave) — Wiseguy, Nov 22 '11 at 14:22
It's a similar question, however, I still can't figure out how to integrate it with my existing regex. — xar, Nov 22 '11 at 14:36

score 23 · Accepted Answer · edited May 23 '17 at 12:16

23

As found in the answer to this question, you could match accented characters using the full Letter Unicode property \p{L}. That includes regular a-z characters along with accented ones, so replace a-z in your expression with this like so:

$reg = "#[^\p{L}\s-]#u";

Note that to use this you need the UTF-8 modifier u after your closing delimiter, as the docs say such Unicode "character types are available when UTF-8 mode is selected".

edited May 23 '17 at 12:16

Community

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1

answered Nov 22 '11 at 14:57

Wiseguy

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1

In my case I had to add the u modifier (UTF8) for it to work. – user276648 Aug 19 '13 at 04:58
@user276648 Thanks, nice spotting. Updated to reflect that. – Wiseguy Aug 21 '13 at 03:17
Thanks! I was missing the "u" unicode modifier!!! – pablorenato Aug 21 '22 at 09:09

Galled · Answer 2 · 2011-11-22T14:50:50.040

I think you can use the hexadecimal representation of each letter:

<?php
function IsAlpha($sString)
{

  $reg = "#[a-zA-Z\xE1\xE9\xED\xF3\xFA\xC1\xC9\xCD\xD3\xDA\xF1\xD1]+#i";
  $count = preg_match_all($reg, $sString, $matches, PREG_OFFSET_CAPTURE);
  return $matches;
}
echo '<pre>';
print_r(IsAlpha("abcdefgh ñ á é í ño 123 asd asáéío nmas asllsdasd óúfl ÑABDJÓ ÚñÍÉ"));
echo '</pre>';

I do not know if there are all the letters, but you can add more with this link.

score 0 · Answer 3 · answered Nov 03 '19 at 16:33

0

You can also use T-Regx:

pattern('[^\p{L}\s-]', 'u')->fails($s);

answered Nov 03 '19 at 16:33

Danon

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PHP Regex validate letters and Spanish accent

3 Answers3

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