[SOLVED] eregi pattern

[xProteuSx]

What would be an 'eregi()' pattern for a string that is:

 

- alphanumeric

- 4-12 characters

 

I'm a little confused??  My book is only for PHP version 4.  Most online resources are useless.

 

Would this be it?

 

eregi([a-z]+[A-Z]+[0-9]+{4,12},$string)

[rajivgonsalves]

I don't know about ereg but preg would be equivalent would be

 

 

preg_match("/[a-zA-Z0-9]{4,12}/i",$string)

[xProteuSx]

So are you saying that something like this would work?

 

if (!preg_match("/[a-zA-Z0-9]{4,12}/i",$string)

{

echo 'You have entered an invalid character, or your sting is not 4-12 characters long.';

}

 

[rajivgonsalves]

Yep that would do

[Dragen]

I believe the ereg would be:

if (!eregi("^[a-z0-9]{4,12}4", $string)
{
echo 'You have entered an invalid character, or your sting is not 4-12 characters long.';
}

 

which is pretty similar. I think preg_match is supposed to be quicker anyway.

[xProteuSx]

When you use the following code:

 

if (!eregi("^[a-z0-9]{4,12}4", $string)

 

What does the second '4' mean?  The one here  >> }4" <<

[xProteuSx]

Also, I with this string, does it accept upper case characters?

 

if (!eregi("^[a-z0-9]{4,12}4", $string))

 

or do I have to do this:

 

if (!eregi("^[a-zA-Z0-9]{4,12}4", $string))

 

??

[Dragen]

sorry the four was supposed to be a $.

Yes it's not case sensitive as it's using 'eregi', not 'ereg'

if (!eregi("^[a-z0-9]{4,12}$", $string)
{
echo 'You have entered an invalid character, or your sting is not 4-12 characters long.';
}

 

if you want only lower case use this:

if (!ereg("^[a-z0-9]{4,12}$", $string)
{
echo 'You have entered an invalid character, or your sting is not 4-12 characters long.';
}

or for only caps switch the a-z, with A-Z

[xProteuSx]

For those who are following this thread ...

 

If you can't get this to work:

 

if (!ereg("^[a-zA-Z0-9]{4,12}$", $string)
{
echo 'You have entered an invalid character, or your sting is not 4-12 characters long.';
}

 

This should fix it:

 

if (!ereg("^([a-zA-Z0-9]){4,12}$", $string)
{
echo 'You have entered an invalid character, or your sting is not 4-12 characters long.';
}

 

That's just something that I found.  I had the first snippet work on one page, but not on another.  I did not take the time to figure out why, because this second snippet was the fix and I'm short on time.

[Dragen]

ah yeah.. another thing I missed out.. the brackets are neccessary.

That's what I get for writing code at ridiculous times at night

[dsaba]

Most online resources are useless

Not true. And still, isn't phpfreaks on online resource that you're using? Are we useless?

[Dragen]

And still, isn't phpfreaks on online resource that you're using? Are we useless?

no. we're just clumsy.. well, I am at any rate