How to allow space in input form

I am trying to build site with custom script. I have problem with allowing space in Name input field. If i include space, it will give error but if input slash or under开发者_运维技巧score, it accepts.

my name - i am getting not allowed error

my_name - i am getting success message.

code

if(!preg_match('/^[0-9a-zA-Z\xe0-\xef\x80-\xbf._-]+$/i',$nickname)) {

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You need to add \s for space to your regex.

I have try this :

[0-9a-zA-Z\xe0-\xef\x80-\xbf._-]+\s*

For debugging regex may be you can use this tools.