从字符串中删除多余的空格 [英] Remove excess whitespace from within a string

问题描述

我从数据库查询中接收到一个字符串，然后在将其放入CSV文件之前，删除了所有HTML标记，回车符和换行符.唯一的是，我找不到从字符串之间的 中删除多余空白的方法.

I receive a string from a database query, then I remove all HTML tags, carriage returns and newlines before I put it in a CSV file. Only thing is, I can't find a way to remove the excess white space from between the strings.

删除内部空白字符的最佳方法是什么?

What would be the best way to remove the inner whitespace characters?

推荐答案

不确定确切要做什么，但有两种情况:

Not sure exactly what you want but here are two situations:

1. 如果仅在字符串的开头或结尾处理多余的空格，则可以使用trim()，ltrim()或rtrim()删除它.

1. If you are just dealing with excess whitespace on the beginning or end of the string you can use trim(), ltrim() or rtrim() to remove it.

如果要处理字符串中的多余空格，请考虑由多个空格 " "*和一个空格 " "组成的preg_replace. /p>

If you are dealing with extra spaces within a string consider a preg_replace of multiple whitespaces " "* with a single whitespace " ".

示例:

$foo = preg_replace('/\s+/', ' ', $foo);

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