Question

php如何将字符串中的\n变成真正的换行符？

Answer 1

php有个函数

<?php
echo nl2br("foo isn't\n bar");
?>

这个函数自动 把\n换成br

Answer 2

<?php
$str = "abc\ndef";
$order = "\n";
$replace = "<br/>";
$newstr = str_replace($order,$replace,$str);

echo $newstr;
?>