Regular expression

@webtekieMar 17.2005

I am trying to setup regular expression that allows only alphas, digits and if ‘_v’ is typed it should follow by a number and nothing else. I tried this:

[code=php]regex = new RegExp(“[a-zA-Z0-9]+’_v'[0-9]”, “i”);[/code]

But doesn’t seem to work.
Any help is appreciated,
webtekie

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JavaScript

@NedalsMar 17.2005 — #Pretty close ?

The _v should not be quoted.

Did you only what 1 digit after the _v? If so take out the + after d+ (equiv to [0-9])

<i>
 </i>var data = "_v2788c2";
 if (/^([a-zA-Z0-9]+|_vd+)$/.test(data)) { alert('ok') } else { alert('no good') }

@scragarMar 17.2005 — #regex = new RegExp("([a-zA-Z0-9]|_v[0-9])", "i");

@A1ien51Mar 17.2005 — #nevermind....

@webtekieauthorMar 17.2005 — #thanks guys,

So, regex = new RegExp("([a-zA-Z0-9]|_v[0-9])", "i"); will check if I type something like test_vd23 regex will catch it and it I type test_v23 it will allow?

@NedalsMar 17.2005 — #No!

regex = new RegExp("([a-zA-Z0-9]|_v[0-9])", "i");

Will build a regex but will not do anything by itself. In addition, if you use this regex it will pass just about anything.

You need to perform a TEST as I coded above!

Now that you have REDEFINED the problem, you wll need something like this

<i>
 </i>var data = "test_v27882";
 var regex = new RegExp("^[a-z0-9]+(_v[0-9]+)*$", "i");
 if (regex.test(data)) { alert('ok') } else { alert('no good') }
 
 OR
 
 if (/^[a-z0-9]+(_vd+)*$/i.test(data)) { alert('ok') } else { alert('no good') }

@webtekieauthorMar 17.2005 — #Sorry for confusion.

Works great!

thanks,

webtekie

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