How do I write a regex that allows for up to 7 characters plus one whitespace? [closed]

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How do I write a re开发者_C百科gex that allows for up to 7 characters plus one whitespace

Sorry I'm a complete novice at regex stuff

Any help would be greatly appreciated

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MODIFIED: The character can be either a letter or number...as it's for a postcode widget

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I would think

/^\w{1,7}\s?$/

which is

^       start of string  
\w      letters, numbers and underscore  
{1,7}   one to seven  
\s      whitespace  
?       zero or 1 of the preceding  - remove it if you want JUST one space  
$       end of string

If you do not want the underscore change \w to [a-zA-Z0-9]
If you want ANY character, change \w to a . (fullstop)

More here http://lawrence.ecorp.net/inet/samples/regexp-intro.php

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This should match what you need:

\S{0,7}\s

Unfortunately you didn't specify what kind of characters you need to match. So this one matches up to seven non-whitespace characters followed by a whitespace character.

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Try this regex:

/^[A-Za-z0-9]{0,7}\s$/

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/[a-zA-Z0-9]{0,7}\s/

7 chars followed by one whitespace character.

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• Exactly one whitespace: /^.{0,7}\s$/
• At least one whitespace: /^.{0,7}\s+$/
• Zero or one whitespace: /^.{0,7}\s?$/
• Zero or more whitspace: /^.{0,7}\s*$/

If you want to require at least one character before the whitespace, use {1,7}.

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Something like this should help you:

[a-zA-Z0-9]{1,7}\s