将 \n\n 格式化为 \n 并在 PHP 中禁用唯一的 \n(a la reddit) [英] Format \n\n into \n and disable unique \n in PHP (a la reddit)

问题描述

我希望为我的网站做与我在 reddit 上看到的一样的事情.当你\n一次时，它不起作用，你必须做两个\n\n才能得到一个

I'm looking to do the same thing for my website as I've seen on reddit. When you \n once, it will not work, you will have to do two \n\n to get one

我试过这个:

$texte = preg_replace('#{\n}#', '', $texte);
$texte = preg_replace('#{\n}{\n}#', '\n', $texte);
$texte = nl2br($texte);

它不起作用……有人可以帮忙吗?

and it doesn't work... someone can help?

推荐答案

试试这个:

$texte = preg_replace('#(\r\n|\r)#', "\n", $texte);
$texte = preg_replace('#\n(?!\n)#', ' ', $texte);
$texte = preg_replace('#\n\n#', "\n", $texte);
$texte = nl2br($texte);

第一行规范了行尾.第二个用空格替换单个 \n .第三行将双 \n 替换为一个.

The first line normalizes line endings. The second replaces single \ns by a space. The third line replaces double \ns by a single one.

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