I’d like to give my users the option to not only fill in letters and numbers, but also “special” letters like the “á”, “é”, etc. However, I do not want them to be able to use symbols like “!”, “@”, "%”, etc.
Is there a way to write a regex to accomplish this? (Preferably without specifying each special letter.)
Now I have:
$reg = '/^[w-]*$/';
$test = '<font color="black">0</font><font color="white">1101100001001101</font><font color="black">1</font><font color="white">0110</font>';
echo preg_replace ('~(<font color="white">)([10]*)(</font>)~e', '"\1" . str_repeat(" ", strlen ("\2")) . "\3"', $test);
Thank everybody for help.
My solution based on 'bobbogo' solution. Thank you.
Regular expression:
(?=(XX.*?YY.*?ZZ))(?=(.*ZZ))
Result (from RegexBuggy):
1 XXccYYeeXX_ZZ XXccYYeeXX_ZZkkYYmmXX_ZZnnXXooYYuuXX_ZZ
2 XX_ZZkkYYmmXX_ZZ XX_ZZkkYYmmXX_ZZnnXXooYYuuXX_ZZ
3 XX_ZZnnXXooYYuuXX_ZZ XX_ZZnnXXooYYuuXX_ZZ
4 XXooYYuuXX_ZZ XXooYYuuXX_ZZ
Possible it can by more optimized? I am not big professional in regex.
There are couple of problems:
@ or # due to use of SYou can fix it by using a negative lookahead to disallow consecutive occurrence of period/hyphen/underscore and remove S from middle of regex that allows any non-space character
^[a-zA-Z0-9](?!.*[_.-]{2})[w.-]{4,13}[a-zA-Z0-9]$
RegEx Demo
Use the /u modifier. That will enable Unicode for the regexes. http://php.net/manual/en/reference.pcre.pattern.modifiers.php
You could use Unicode character properties to describe the characters:
p{L}describes the class of Unicode letter characters.