Alphacharacter only?

[silverthorn]

Anyone know what the correct usage of strstr() would be to check from a form input to only allow alpha characters? (ie. no underlines, numbers, special characters).

This is needed for a signup page I am currently working on.

-- M

[tijger]

i think you can do that with ereg.

look at: http://www.php.net/manual/en/function.ereg.php

something like the following should work:

if(ereg("^{[[:alpha:]]$",} $str)) {
echo "there are only alpha characters in ". $str;
} else {
echo "there are illegal characters in ". $str;
}

hope it works and is what you want.

greetings

[Anon]

If this you are using for client side validation better do with JavaScript.

strstr() just checks wheather the string is present inside or not.

eg:-
$firstvar = "This is first string";
$secondvar = "first";

strstr("$secondvar",$firstvar)

chaeck wheather the second string is present in first or not.

Chanderjit

[silverthorn]

Hmm, not exactly.

This is sort of what I am looking for:

If the input ($name) is test, then the message should be like: 'Name approved' should be seen.

If the input is test123, then a message of 'Name NOT approved' should be seen. Note this should also disallow an input like 'test 123' (note the space)

I tried the following, but it did not work either for only allowing alphacharacters:

<?

$new_name = $character;

if (eregi("^[a-z]$", $new_name)) {
echo "Name approved";
} else {
echo "Name NOT approved";
}

?>

Any thoughts?

[tijger]

okay sorry. but you should read manuals and so on about regex.

i don't know how many chars are allowed (i made it 1-10 -> {1,10}) but you can change that.

if (eregi("^{[[:alpha:]]{1,10}$",} $new_name)) {
echo "Name approved\n";
} else {
echo "Name NOT approved\n";
}

good luck.
let me know when it is working.

greetings.

[Anon]

Yep. Works perfectly. Thanks.

-- M