validation_functions.php

<?php
// Vaildation Functions

// Presence validation
function has_presence($value) {  // returns true if it has presence and false if empty.
    return isset($value) && $value !== "";
}


// String length validation
function has_maximum_length($value, $maxsize) { // returns true if object is less than maximum length
    return strlen($value) <= $maxsize;
}


// Type validation

// Inclusion in a set validation
function has_membership_in($value, $set) { // returns true if item belongs to the set.
    return in_array($value, $set);
}

function has_gender($value) { // returns true if gender is male or female.
    $genderset = array("male", "female");
    return in_array($value, $genderset);
}

/*
// Format validation
// preg_match($regex, $subject)
if (preg_match( , )) {
    // match found
} else {
    // match not found
}
*/

// Display form errors
function form_errors($errors=array()) {
    $output = "";
    if (!empty($errors)) {
        $output .= "<div class=\"error\">";
        $output .= "<ul>";
        foreach ($errors as $key => $error) {
            $output .= "<li>{$error}</li>";
        }
        $output .= "</ul>";
        $output .= "</div>";
    }
    return $output;
}






?>