使用nl2br仅插入一次换行符，而不是在每个新行之前插入换行符

Question

I have a string and i am using nl2br to insert line breaks.

how can i make it only insert one new line break before all newlines rather than a line break before all new lines

Answer 1

You could use preg_replace() afterwards to match all repeating BR's and replace with a single one

$pattern = "/(\<br\/\>)+/i";
$replacement = "<br/>";
$subject = "hi<br/><br/><br/>how are<br/>you";
$limit = -1;
$count = 0;
$result = preg_replace ($pattern, $replacement, $subject, $limit, $count);