Replacing Multiple Words in PHP

Previously, when I was writing PHP programs, I only knew how to use str_replace to replace a single word. If there were multiple keywords that needed to be replaced in an article, I had to replace them one by one, which was very troublesome. Later, I accidentally discovered that the parameters of str_replace can be arrays, and it can be written like this:

<?php
$str = "你今天开心不开心呀？";
$arr1 = array("你","开心");
$arr2 = array("他","快乐");
$str = str_replace($arr1, $arr2, $str);
echo $str;
?>

The final output result is: "他今天快乐不快乐呀？" Isn't it convenient to replace words using arrays?

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