function circle_radius($center_point, $edge_point)
{
$center_point = array_altkey($center_point, array('x', 'y'));
$edge_point = array_altkey($edge_point, array('x', 'y'));
return sqrt(pow($edge_point[0] - $center_point[0], 2) + pow($edge_point[1] - $center_point[1], 2));
}
function set($set, $add = true)
{
if (is_array($set[0])) {
foreach ($set as $value) {
$this->set($value, $add);
}
} else {
$temp = array_altkey($set, array('table', 'field', 'value'));
if (is_array($temp[2])) {
$temp[2] = array_altkey($temp[2], array('table', 'field'));
}
if ($add) {
$this->set[$temp[0]][$temp[1]] = $temp[2];
} else {
unset($this->set[$temp[0]][$temp[1]]);
}
}
}
function str_check($string, $settings = array())
{
if (!is_string($string)) {
$string = (string) $string;
}
$checks = array_altkey($settings, array('min', 'max', 'regexp'));
$strlen = strlen($string);
$results = array();
if (isset($checks[0]) && isset($checks[1]) && $checks[0] == $checks[1]) {
if ($strlen != $checks[0]) {
$results[] = 'Not exactly ' . $checks[0] . ' characters.';
}
} else {
if (isset($checks[0]) && $strlen < $checks[0]) {
$results[] = 'Less than ' . $checks[0] . ' characters.';
}
if (isset($checks[1]) && $strlen > $checks[1]) {
$results[] = 'More than ' . $checks[1] . ' characters.';
}
}
if (isset($checks[2]) && preg_match($checks[2], $string)) {
$results[] = 'Does not match allowed characters rule.';
}
if (empty($results)) {
return false;
} else {
return $results;
}
}
