正则表达式仅允许使用字母，数字，空格，逗号，句号? [英] Regex for only allowing letters, numbers, space, commas, periods?

问题描述

我对正则表达式一无所知，因为它对我来说很复杂.我正在使用一个基于正则表达式限制用户输入的程序.我目前正在使用仅允许用户输入的正则表达式:

A-Z and a-z
0-9
.
,
!
?

基本上，典型段落或网络文章中的所有内容.

程序声明输入一个正则表达式，该正则表达式必须使输入的文本匹配(通过preg_match进行评估，并使用s和i标志)，该文本才有效."

我已经尝试过此正则表达式，但没有成功，目前我正在寻找其他人可以尝试.

 '/^[a-zA-Z0-9,.!? ]*$/'

它应该允许一个简单的句子，例如

我叫约翰！我喜欢吃苹果，橘子和葡萄.你愿意和我一起吃饭吗?

解决方案

Debuggex示例

^[a-zA-Z0-9,.!? ]*$

是正则表达式，它可以正常工作，请参见示例网站以测试正则表达式.

I am clueless with regex as it is complicated for me. I am working with a program that limits input from users based on a regex. I am currently after a regex that will only let the user input:

A-Z and a-z
0-9
.
,
!
?

So basically anything in a typical paragraph or web article.

The program states "Enter a regular expression which entered text must match (evaluated with preg_match, using s and i flags) for it to be valid."

I have tried this regex with no success and I am currently searching for others to try.

 '/^[a-zA-Z0-9,.!? ]*$/'

It should allow a simple sentence such as

"HI my name is John! I like to eat apples, oranges, and grapes. Will you eat with me?

解决方案

Debuggex example

^[a-zA-Z0-9,.!? ]*$

is what the regex is, it works, see example website to test regex.

这篇关于正则表达式仅允许使用字母，数字，空格，逗号，句号?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！