Validation concept for Contact-Form

gistfile1.php

<?php
//This is what I'm considering for validation.  It should work both in JavaScript and PHP, and should only have to be written out in the configuration.

$validate = array(
    'first_name' => 'filled|name|max:64',  //Max size of the field can only be 64
    'last_name' => 'required|equals:[Jones, James, Smith]|max:64', //'required' is the same as 'filled', and this will only validate if the last name is Jones, James, or Smith.
    'middle_name' => 'optional|equals:Danger',  //'optional' itself is optional.  This will only validate if the middle name is Danger.
    'Title' => 'optional|truncate:5'  //This will always validate, but if any value is entered that is longer than 5 characters, it will truncate it down to 5 characters.
);


/*Obviously there will be a lot more in there as I go along, what I've got right now are:
trim - removes whitespace from the beginning and end of the data, should be placed at the beginning.
rtrim - removes whitespace from the end of the data, should be placed at the beginning.
ltrim - removes whitespace from the beginning of the data, should be placed at the beginning.
numeric - validates only if the value is numeric (this includes 1.1 and so forth, and scientific notation)
filled, required - validates only if the field has something in it.
empty, blank - validates only if the field is left blank.
optional - always validates.  Putting this with others (beyond formatting directives) will essentially make the field required.  Added in for ostensibility.
min:<number> - validates only if the string's character count is over <number>.
max:<number> - validates only if the string's character count is under <number>.
size:<number>|[<set>] - validates only if the string's character count is <number> or one of <set>
truncate:<number> - truncates the string to <number> characters.
equal:<value>|[<set>] - validates only if the string is equal to <value> or one of <set>
notequal:<value>|[<set>] - validates only if the string is not equal to <value> or one of <set>
>:<number>, gt:<number> - validates only if the value is greater than <number>.  Best paired with numeric.
>=:<number>, gte:<number> - validates only if the value is greater than or equal to <number>.  Best paired with numeric.
<:<number>, lt:<number> - validates only if the string is less than <number>.  Best paired with numeric.
<=:<number>, lte:<number> - validates only if the string is less than or equal to <number>.  Best paired with numeric.
regex:<regexname> - validates only if the value matches the regex.  Regexes are listed bewow.
notregex:<regexname> - validates only if the value does not match the regex.  Regexes are listed below.

Regexes are (so far):
'name' - /[A-Z- ]+/i, can only contain A-Z, -, or space.  Must have at least one.  Case-insensitive.
'letters' - /[A-Z]+/i, can only contain A-Z.  Must have at least one.  Case-insensitive.
'email' - /^[\w\d%+-.]+(?<![._%+-])@(?:[A-Z\d-]+\.)+[A-Z]{2,4}$/i, matches a valid email address.  Regex currently under improvement.
'phone-us-ext' - /\d{3}[-. ]\d{3}[-. ](?:\d{4}|\d{2}[-. ]\d{2})(?: ?(?:(?:x|ex|ext|extension) ?\d{1-5}))?/i, matches any valid US phone number, delimited by ., -, or a space, with optional 1-5 digit extension (specified by x, ex, ext, or extension, case-insensitive)
'phone-us' - /\d{3}[-. ]\d{3}[-. ](?:\d{4}|\d{2}[-. ]\d{2})/, matches any valid US phone number, delimited by ., -, or a space, without optional extension.

As a shorthand method of calling regexes, you can just use the regex name, IE '...|email|...' maps to '...|regex:email|...'
The same works with notregex, if you prepend an ! to the directive, IE '...|!letters|...' maps to '...|notregex[letters]|...'
WARNING: If you prepend any directive with !, it will automatically assume that it is a notregex directive.
*/
?>