从文本区域的输出中删除空白行

问题描述

我从文本区域获取数据，用户必须在每一行中输入一个名字.稍后，该数据在回车时被拆分.有时用户可能会故意添加空白行.如何检测并删除这些行?我正在使用PHP.我不介意使用正则表达式或其他任何东西.

I get data from a textarea where a user has to enter a name one on each line. That data later gets split at the carriage return. Sometimes a user may add blank lines intentionally. How can I detect these lines and delete them? I'm using PHP. I dont mind using a regexp or anything else.

数据不正确

Matthew
Mark
Luke

John

James

更正数据(注意删除了空白行)

Matthew
Mark
Luke
John
James

推荐答案

使用正则表达式消除 爆炸前的空行(对于任意数量的连续空行都有效，另请参见下一个片段):

Using regex to eliminate blank lines before exploding (works well for any number of consecutive blank lines, also see next snippet):

$text = preg_replace('/\n+/', "\n", trim($_POST['textarea']));

使用正则表达式分割

$lines = preg_split('/\n+/', trim($_POST['textarea']));
$text = implode("\n", $lines);

不使用正则表达式分割

$lines = array_filter(explode("\n", trim($_POST['textarea'])));
$text = implode("\n", $lines);

今天刚感觉有点创意，请选择毒药:)

Just feeling a tad creative today, pick your poison :)

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