无法获取str_replace()来删除PHP字符串中的空格
问题描述：
我得到一个PHP字符串，需要将空格删除.我使用了以下代码，但是当我回显$classname时，它仅显示字符串，其中仍带有空格.
Hi, I am getting a PHP string which I need to strip the spaces out of. I have used the following code but when I echo $classname it just displays the string still with the spaces in it.
<?php
$fieldname = the_sub_field('venue_title');
$classname = str_replace(' ', '', $fieldname);
echo $classname;
?>
答
尝试为正则表达式模式添加 u 参数，因为字符串可以具有UTF-8编码:
>
Try to add u-parameter for regex-pattern, because a string can have UTF-8 encoding:
$classname = preg_replace('/\s+/u', '', $fieldname);