PHP多行新行 [英] PHP multiple new lines

问题描述

我有点卡住了.如何删除与一个换行符连续的多个换行符.彼此之间最多可以有20条换行符.例如

I'm a little stuck. How do I remove multiple newlines which are in a row with one newline. There could be anything up to 20 newlines next to each other. For example

詹姆斯说你好\ n \ n \ n \ n测试\ n测试两个\ n \ n

James said hello\n\n\n\n Test\n Test two\n\n

最终会变成:

詹姆斯说你好\ n测试\ n测试两个\ n

James said hello\n Test\n Test two\n

推荐答案

尝试以下方法:

$str = "Hello\n\n\n\n\nWorld\n\n\nHow\nAre\n\nYou?";
$str = preg_replace("/\n+/", "\n", $str);
print($str);

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