如何使用 PHP 从字符串开头但在某些 HTML 标签内删除空 space?
How can I remove empty space from the beginning of strings but inside some HTML tags using PHP?
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()
,因为我需要在 This is a paragraph
中保留空的 space。我应该如何实现这一目标?谢谢!
您可以使用下面的正则表达式:
(?<=>)(\s| )*|(\s| )*(?=<\/)
https://regex101.com/r/fZ3oQ3/2
PHP 代码示例:
$re = "/(?<=>)(\s| )*|(\s| )*(?=<\/)/";
$str = "<p> This is a paragraph.</p><p> This is another paragraph.</p>\n";
$subst = "";
$result = preg_replace($re, $subst, $str);
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()
,因为我需要在 This is a paragraph
中保留空的 space。我应该如何实现这一目标?谢谢!
您可以使用下面的正则表达式:
(?<=>)(\s| )*|(\s| )*(?=<\/)
https://regex101.com/r/fZ3oQ3/2
PHP 代码示例:
$re = "/(?<=>)(\s| )*|(\s| )*(?=<\/)/";
$str = "<p> This is a paragraph.</p><p> This is another paragraph.</p>\n";
$subst = "";
$result = preg_replace($re, $subst, $str);