PHP:如何以给定格式转换这句话

Question

"[5|five] [Tips|Suggestions] for an Unforgettable Trip|Five suggestions for a un-regret able Trip|[5|five] [tips|suggestions] for an [amazing|incredible] Trip|Five [tips|suggestions] for an astonishing Trip"

到

"[5|five] [Tips|Suggestions] for an Unforgettable Trip~Five suggestions for a un-regret able Trip~[5|five] [tips|suggestions] for an [amazing|incredible] Trip~Five [tips|suggestions] for an astonishing Trip"

我可以使用 str_replace("|", "~", $code) 但问题是我不想将 "|" 转换为 "~" 如果它在 "[ ]" 之间。

Answer 1

for($i=0,$s=strlen($str),$c=0;$i<$s;++$i){
    if($str[$i]=='[')++$c;
    elseif($str[$i]==']')--$c;
    elseif(!$c && $str[$i]=='|')$str[$i]='~';
}