求能过滤掉5个以上重复字符的正则

Question

try:
$str="fdfsdfsfasdg DDDDDDDDDDDDDDDDDDDDDDDDD fffffffsdgggeaeagdfdfdfdfdfdfd"; 
echo preg_replace('/(\S)\\1{4,}/','',$str);

Answer 1

试试
$str="fdfsdfsfasdg DDDDDDDDDDDDDDDDDDDDDDDDD fffffffsdgggeaeagdfdfdfdfdfdfd"; 
echo preg_replace('/.{5，}?/is','',$str);

Answer 2

$str="fdfsdfsfasdg DDDDDDDDDDDDDDDDDDDDDDDDD fffffffsdgggeaeagdfdfdfdfdfdfd";
echo preg_replace('/.{5,}?/is','',$str);

Answer 3

$strs="fdfsdfsfasdg 415156DDDDewrIRETERDDDasdDFFFFFFFFFFFFFFffff1515fffsdgggeaeagdfdfdfdfdfdfd"; 
echo preg_replace('/(\S)\\1{4,}/','',$strs);