用正則表達式中的另一個字符替換字符 PHP

Question

目前，這是我擁有的 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 或新段落替換 £ 字符？ 在正則表達式中所以該行看起來像這樣但不太確定如何實現它。

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

這里不需要正則表達式，只需使用str_replace() ：

$out = str_replace("£", "\n\n", $in);