如何用php标签替换正方形标签

Question

我有两种标签。需要将“ [”替换为“ <”。我尝试了str_replace，但无法正常工作。

第一个标签：

$x = '<break time="2000ms"/>'; 
$y = '[pause="1000ms"]';


echo str_replace(['[ pause =','[pause=','[ pause=','[pause ='],"<break time",trim($y));

第二个标签：

[pitch = "x-low"][endpitch]

转换为

<prosody pitch="x-low"></prosody>

先谢谢了。

........已更新......

$text = 'I am [pitch = "high"]Rudratosh Shastri[endpitch]. what is your name ? how  are you? sorry [pause="3000"] i can not hear you ?[rate="-70.00%"] i still can\'t hear you[endrate] ? [rate="+50.00%"]why i can\'t hear you[endrate] ?';

echo $text = preg_replace("/\[pause.*\"(\w+)\".*\]/", '<break time="$1ms"/>', $text);

output: I am [pitch = "high"]Rudratosh Shastri[endpitch]. what is your name ? how are you? sorry <break time="3000ms"/> ?

休息时间标记后未得到输出。