假设我有这个:
<p> This is a paragraph.</p><p> This is another paragraph.</p>
我希望它是:
<p>This is a paragraph.</p><p>This is another paragraph.</p>
我不能简单地使用trim()，因为开头有<p>。但我也不能使用str_replace()/preg_replace()，因为我需要保留This is a paragraph内部的空白空间。我该如何做到这一点?谢谢!
你可以在下面使用正则表达式:
(?<=>)('s| )*|('s| )*(?=<'/)
$re = "/(?<=>)(''s| )*|(''s| )*(?=<''/)/";
$str = "<p> This is a paragraph.</p><p> This is another paragraph.</p>'n";
$subst = "";
$result = preg_replace($re, $subst, $str);