PHP Regex allow spaces but fail if they are on there own or after a word

Question

Not wanting to end up with a chameleon question I have started a new one, I am trying to use php regex to match the following...

Only allow alphanumeric characters
Have at least 2 characters
Does not consist of only numbers

I have this regex so far http://regex101.com/r/lL3uT4....

^(?![0-9]+$)[a-zA-Z0-9 ]{2,}$

This is working but the following data still validates when i want it to fail...

47 (note the space after 47)
   (two spaces next to each other)

I understand it is to do with spaces but I still need the following to validate...

47 International
3 apple

I think what I am trying to do is allow spaces but fail them if the string consists entirely of spaces or if there is a space but then no character afterwards

anubhava · Accepted Answer · 2014-04-02 22:44:20Z

1

You can use:

^(?! )(?![0-9]+$)[a-zA-Z0-9 ]+[a-zA-Z0-9]$

Online Demo

answered Apr 2, 2014 at 22:44

anubhava

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1 Comment

fightstarr20 Over a year ago

Thanks once again, it's good comparing the two answers so I can see whats changed. Much appreciated

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