计算textarea中的新行以调整PHP中的容器大小? [英] count new lines in textarea to resize container in PHP?
问题描述
我有一个textarea提交给一个php文件。
我使用它来使它看起来完全像用户输入文本一样:
$ ad_text = nl2br(wordwrap($ _ POST ['annonsera_text'],47,\\\
,true));
如果我想调整一个容器的大小,我必须能够读取变量中有多少行' $ ad_text'。
有没有办法做到这一点...
我还在学习谢谢你可以使用正则表达式:
$ b
preg_match_all(/(\\\
)/,$ text,$ matches); $ p $
preg_match_all
$ count = count($ matches [0])+ 1; // +1为最后的齿
编辑:由于您使用nl2br所以' \\\
'被替换为
< br>
。所以你需要这个代码。
preg_match_all(/(< br>)/,$ text,$火柴);
$ count = count($ matches [0])+ 1; // $为最后的齿
然而,< br>
不会在textarea中显示为换行符(如果我没有记错的话),因此您可能需要删除 nl2br
。
希望这有助于。
I have a textarea submitted to a php file.
Im using this to make it look exactly as the user entered the text:
$ad_text=nl2br(wordwrap($_POST['annonsera_text'], 47, "\n", true));
If I want to resize a container I must be able to read how many lines are in the variable '$ad_text'.
Is there a way to do this...
I am still learning so thanks for your help...
You can use regular expression:
preg_match_all("/(\n)/", $text, $matches);
$count = count($matches[0]) + 1; // +1 for the last tine
EDIT: Since you use nl2br so '\n
' is replaced by <br>
. So you need this code.
preg_match_all("/(<br>)/", $text, $matches);
$count = count($matches[0]) + 1; // +1 for the last tine
However, <br>
will not be display as newline in textarea (if I remember correctly) so you may need to remove nl2br
.
Hope this helps.
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