php 计算已发布字符串中的行数
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/7955402/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
Count lines in a posted string
提问by Cyclone
I've tried this: count new lines in textarea to resize container in PHP?
我试过这个：计算 textarea 中的新行以调整 PHP 中的容器大小？
But it doesn't seems to be working:
但它似乎不起作用：
$content = nl2br($_POST['text']);
preg_match_all("/(<br>)/", $content, $matches);
echo count($matches[0]) + 1;
It'll always output 1.
它总是会输出1.
Is there any other solutions to count lines in a string?
有没有其他解决方案来计算字符串中的行数？
回答by K2xL
Found this in one of my old apps... Not sure where I got it from.
在我的一个旧应用程序中找到了这个……不知道我从哪里得到的。
$lines_arr = preg_split('/\n|\r/',$str);
$num_newlines = count($lines_arr);
echo $num_newlines;
*Edit - Actually, this probably won't work if your textarea is spitting out html.. check for <br> and <br/>
*编辑 - 实际上，如果您的 textarea 吐出 html，这可能不起作用.. 检查 <br> and <br/>
回答by Pastushenko Yuri
You can try this:
你可以试试这个：
$count = substr_count($_POST['text'], "\n") + 1;
or:
或者：
$count = count(explode("\n", $_POST['text']));
回答by yckart
count( explode(PHP_EOL, $str) );
