Match issue with /u switch

[moxol]

I have problems matching text if I use the /u switch.

First, I want to show code that works fine:

$input = "• nemir s pojačanim pokretima tijela"; 
preg_match("/nemir/iu", $input, $match) ;
$output = $match[0];
echo 'output:' . $output;

 

But, if I change $input to substr($input, 1) then preg_match doesn't match anything:

 $input = "• nemir s pojačanim pokretima tijela"; 
 $input = substr($input, 1);
 preg_match("/nemir/iu", $input, $match) ;
 $output = $match[0];
 echo 'output:' . $output . "<br/>";

I tried without the /u switch, and it works, but I need the /u switch.

I don't know what the issue is, but my guess is that has something to do with the symbol • at the beggining.

Can someone help me?

[mac_gyver]

substr() deals with single byte characters. try mb_substr()

[moxol]

Thank you.