replace characters that are hidden in text
PhpRegexUnicodePhp Problem Overview
How to remove (that are hidden) and SPACES in below text but
- hold UNICODE characters
- hold
<br>tag
i tested:
-
i used
trim($string)=> NOT WORKED -
i used
str_replace(' ', '', $string)=> NOT WORKED -
i used some regex => NOT WORKED
<br>تاريخ ورود: یکشنبه ۲۳ بهمن ماه ۱۳۹۰
UPDATE: 
Thanks
Php Solutions
Solution 1 - Php
This solution will work, I tested it:
$string = htmlentities($content, null, 'utf-8');
$content = str_replace(" ", "", $string);
$content = html_entity_decode($content);
Solution 2 - Php
Not tested, but if you use something like:
$string = preg_replace("/\s/",'',$string);
That should remove all spaces.
UPDATE
To remove all spaces and references, use something like:
$string = preg_replace("/\s| /",'',$string);
UPDATE 2
Try this:
$string = html_entity_decode($string);
$string = preg_replace("/\s/",'',$string);
echo $string;
Forgot to say, reconvert the html entities so add this after the replacement:
htmlentities($string);
Solution 3 - Php
All solutions above kind of work, until one starts to work with German language where there are such letters:
ä ä
and othere simial ones. I use the following code:
$string = preg_replace ( "!\s++!u", ' ', $string );
More details here: PCRE(3) Library Functions Manual
Solution 4 - Php
This worked for me.
preg_replace("/ /",'',$string)