为什么从一个字符串中删除多个空格

Question

我有存储在数据库中的代码，并且在php中以html形式显示

我尝试了preg_replace，nl2br以及所有其他方法，但仍未获得预测的输出。

假设我有

这样的字符串

this is the test

$postContent = $getsingleviewodetail->epost_content;
$postContent = nl2br($postContent);
{!!substr($postContent,0,200)!!}

在测试前的上述句子中，我们有很多空格，我想在我的网页中显示这些空格。

Answer 1

执行以下操作：

strcmp

p {
  white-space: pre
}

Answer 2

运行良好

在php

$string = "this is the                  test <br>test";
$string = preg_replace('#<br\s*/?>#', "\n", $string);

您认为

<pre>{{$string}}</pre>

Answer 3

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