[SOLVED] php string validation

[Ninjakreborn]

What is a simple way to validate a string to make sure it doesn't have any spaces, and doesn't start with a letter.)

[effigy]

Regular expressions. A preg_match for /\s/ will look for (white)space. A preg_match for /^[A-Za-z]/ will look for a letter at the beginning of a line. Use Unicode properties if the definition of "letter" is broad.

[Nameless12]

without regex you can do the below

<?php
if (is_numeric($str[0]) && strpos($str, ' ') === false) {
//success
}
?>

[neel_basu]

without regex you can do the below

<?php
if (is_numeric($str[0]) && strpos($str, ' ') === false) {
//success
}
?>

Ya what Nameless12 told is simple and good if you dont want the complexity of Regex

[effigy]

Ya what Nameless12 told is simple and good if you dont want the complexity of Regex

 

...and if by "doesn't start with a letter" you mean "numeric."

[neel_basu]

If "doesn't start with a letter" means something other than (\s) e.g. a-zA-Z

he needs regex

[Nameless12]

Sorry I assumed it was a number, here is the modified version and no regex is not required.

 

<?php
if (!ctype_alpha($str[0]) && strpos($str, ' ') === false) {
//success
}
?>

 

 

[neel_basu]

no regex is not required.

wrong english it should be "no regex is required."

[Nameless12]

no regex is not required.

wrong english it should be "no regex is required."

 

I was actually thinking in my head, "and no, regex is not required" but its 3am here and that is why I typed what I did. Try not to be so anal over something so small, this is a programming forum not an english forum!

[Ninjakreborn]

Thanks for all the help.  I have never used C alpha either but I saw the functions.  later on I want to go ahead and looking into the C-type library see what all they have to offer.  Thanks.