Replace all certain character except first occurrence in PHP
You could make use substr() and str_replace() fairly easily:
$str = '1.1.0.1';$pos = strpos($str,'.');if ($pos !== false) { $str = substr($str,0,$pos+1) . str_replace('.','',substr($str,$pos+1));}echo $str;
$s = preg_replace('/((?<=\.)[^.]*)\./', '$1', $s);Matches zero or more non-dot characters followed by a dot, but only if the match was preceded by a dot. This prevents a match on the initial digit(s). Replaces the match with only the non-dot characters (the digits), which were captured in group #1.
$input="1.1.1.1";$s = explode(".",$input ) ;$t=array_slice($s, 1);print implode(".",array($s[0] , implode("",$t)) );or
$input="1.1.1.1";$s = explode(".",$input ,2) ;$s[1]=str_replace(".","",$s[1]);print implode(".",array($s[0] ,$s[1] ) );