PHP : How to get repeated character in string

Question

I have strings like this :

Aaaaaaaaa

I want to stop repeating just to 3 times, but not break the lowercase/uppercase, like this :

Aaa

My regex breaks the lowercase/uppercase :

$patternReplace = '/(.)\1{3,}/iu';    
$chaine = preg_replace($patternReplace, '$1$1$1', $chaine, -1 );

Result :

AAA

I want to get :

Aaa

thanx for help

RomanPerekhrest · Accepted Answer · 2016-05-06 14:05:14Z

1

Use subpatterns to get the additional backreferences(first subpattern is for the first character, the second subpattern - for the next two identical characters) :

$chain = "Aaaaaaaaa";
$patternReplace = '/(.)(\1{2})\1{1,}/iu';
$chain = preg_replace($patternReplace, '$1$2', $chain);

print_r($chain);  // "Aaa"

answered May 6, 2016 at 14:05

RomanPerekhrest

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