php 从 textarea 输入捕获换行符
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Capture newline from a textarea input
提问by Pritesh Desai
I have a textarea form in my html. If the user hits enter between 2 sentences that data should be carried over to my PHP.
我的 html 中有一个 textarea 表单。如果用户在 2 个句子之间点击输入，则数据应转移到我的 PHP 中。
Currently if the user enters:
当前，如果用户输入：
Apple
Google
MS
and my PHP code is:
我的 PHP 代码是：
$str = $_POST["field"];
echo $str;
I get
我得到
Apple Google MS
as the output. I want output to be like this
作为输出。我希望输出是这样的
Apple
Google
MS
what should I do?
我该怎么办？
回答by Thilo
The newlines should be included in the string that you get from $_POST["field"]. However, if you then use that string as output in HTML, newlines will be treated as whitespace. To force the line breaks, use preg_replace("/\n/", "<br />", $str).
换行符应包含在您从$_POST["field"]. 但是，如果您随后将该字符串用作 HTML 中的输出，则换行符将被视为空格。要强制换行，请使用preg_replace("/\n/", "<br />", $str)。
回答by Galen
This is because when you echo it it's being displayed as HTML. A \ncharacter is interpreted as a space. If you view the source you'll see your desired output.
这是因为当您回显它时，它会显示为 HTML。一个\n字符被解释为一个空格。如果您查看源代码，您将看到所需的输出。
To convert \nto <br>use:
转换\n为<br>使用：
echo nl2br( $str );
