PHP Regex to accept only specific characters

Question

Can you help me? I'm trying to make a PHP Regex to accept only: A-Z, a-z, 0-9, (, ), ! and accented words(á,é,í,ó,ú and Á,É,Í,Ó,Ú) to filter a list.

I tried everyting and searched so much, and I'm not getting succcess... What should I do?

@edit:

if (!preg_match("/^[\p{L}-]*$/u", $line)){

I already tried using this from this thread but didn't worked.

What I'm trying to do? Accept only words that I want to filter this list: List

@edit2: Already tried convertind to UTF8, using iconv, mb_convert_encoding, etc...

You say that you tried "everything," yet you showed us no code. Please include your best code attempt. — Tim Biegeleisen, Mar 19 '18 at 06:22
Possible duplicate of [How do I match accented characters with PHP preg?](https://stackoverflow.com/questions/2133758/how-do-i-match-accented-characters-with-php-preg) — Tim Biegeleisen, Mar 19 '18 at 06:23
Looks like you want to except specific CHARACTERS not specific words — ESP32, Mar 19 '18 at 07:27
Maybe `'~\b(?![A-Za-z]+(?:-[A-Za-z]+)*\b)\p{L}\p{M}*+(?:-\p{L}\p{M}*+)*~u'` — Wiktor Stribiżew, Mar 19 '18 at 07:33
Definition of allowed characters is not clear. Try something like [`/^[\p{Latin}0-9\s)(.,?!-]+$/u`](https://regex101.com/r/9JZ7TG/1/) — bobble bubble, Mar 19 '18 at 10:15
@WiktorStribiżew hey, your code is what it comes closest of what I want., but is missing some special characters like: http://prntscr.com/itek9r.How can I fix? — Amazing man, Mar 19 '18 at 18:04
@Amazingman I have no idea what you mean, please post the data in the *text* form, I cannot OCR it. — Wiktor Stribiżew, Mar 19 '18 at 19:04

score 3 · Accepted Answer · answered Mar 19 '18 at 07:26

3

It think this is what you are looking for:

if (preg_match("/[a-zA-Z0-9áéíóúÁÉÍÓÚ\s]*/", $line)){
    // line is ok
}

You can test here: https://regex101.com/r/4Ozxw2/1

answered Mar 19 '18 at 07:26

ESP32

8,089
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I was kind of surprised how well this approach worked for a registered trademark symbol as well. – Mike_K Mar 24 '22 at 21:16

score 0 · Answer 2 · answered Mar 19 '18 at 06:35

0

Something like

<?php

$strings = ['hash#', 'percent%', '!exc', 'ó','-',',','num1'];

foreach($strings as $v) {
    if (preg_match("/^[\p{L}A-Za-z0-9,!]*$/u", $v)) {
        print $v . '<br/>';
    }
}

answered Mar 19 '18 at 06:35

Dachi Natsvlishvili

134
1
4

Not exactly what I'm looking for :/ – Amazing man Mar 19 '18 at 06:40

score 0 · Answer 3 · answered Mar 19 '18 at 07:18

Use this...

<?php

$strings = ['test(yes)h#', 'test2%', '!test3', 'ó','-',',...','test'];

foreach($strings as $v) {
    if (preg_match("/^[\p{L}A-Za-z0-9! | #\((.*?)\)#]*$/u", $v)) {
        print $v . '<br/>';
    }
}

?>

I think this will solve your issue.

PHP Regex to accept only specific characters

3 Answers3

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