用正則表達式中的另一個字符替換字符PHP

Question

當前，這是我有的preg_replace字符串。

$mtg_post['post_content'] = preg_replace("[^\\x20-\\x7e]", "",$ability); 

這是$ ability中包含的數據示例。

At the beginning of your upkeep, put a doom counter on Armageddon Clock.£At the 
beginning of your draw step, Armageddon Clock deals damage equal to the number 
of doom counters on it to each player.£{4}: Remove a doom counter from Armageddon 
Clock. Any player may activate this ability but only during any upkeep step. 

我想用2xreturn或新段落來替換£字符嗎？在正則表達式，所以行看起來像這樣，但不太確定如何實現這一點。

At the beginning of your upkeep, put a doom counter on Armageddon Clock. 

At the beginning of your draw step, Armageddon Clock deals damage equal 
to the number of doom counters on it to each player. 

{4}: Remove a doom counter from Armageddon Clock. Any player may activate 
    this ability but only during any upkeep step. 

Answer 1

無需這裏正則表達式，只需使用str_replace()：

$out = str_replace("£", "\n\n", $in);