$minimized
$minimized
Tells us whether or not an HTML attribute is minimized.
Has no meaning in other contexts.
Validates the HTML attribute lang, effectively a language code.
parseCDATA(mixed $string) : mixed
Convenience method that parses a string as if it were CDATA.
This method process a string in the manner specified at http://www.w3.org/TR/html4/types.html#h-6.2 by removing leading and trailing whitespace, ignoring line feeds, and replacing carriage returns and tabs with spaces. While most useful for HTML attributes specified as CDATA, it can also be applied to most CSS values.
| mixed | $string |
<?php
/**
* Validates the HTML attribute lang, effectively a language code.
* @note Built according to RFC 3066, which obsoleted RFC 1766
*/
class HTMLPurifier_AttrDef_Lang extends HTMLPurifier_AttrDef
{
/**
* @param string $string
* @param HTMLPurifier_Config $config
* @param HTMLPurifier_Context $context
* @return bool|string
*/
public function validate($string, $config, $context)
{
$string = trim($string);
if (!$string) {
return false;
}
$subtags = explode('-', $string);
$num_subtags = count($subtags);
if ($num_subtags == 0) { // sanity check
return false;
}
// process primary subtag : $subtags[0]
$length = strlen($subtags[0]);
switch ($length) {
case 0:
return false;
case 1:
if (!($subtags[0] == 'x' || $subtags[0] == 'i')) {
return false;
}
break;
case 2:
case 3:
if (!ctype_alpha($subtags[0])) {
return false;
} elseif (!ctype_lower($subtags[0])) {
$subtags[0] = strtolower($subtags[0]);
}
break;
default:
return false;
}
$new_string = $subtags[0];
if ($num_subtags == 1) {
return $new_string;
}
// process second subtag : $subtags[1]
$length = strlen($subtags[1]);
if ($length == 0 || ($length == 1 && $subtags[1] != 'x') || $length > 8 || !ctype_alnum($subtags[1])) {
return $new_string;
}
if (!ctype_lower($subtags[1])) {
$subtags[1] = strtolower($subtags[1]);
}
$new_string .= '-' . $subtags[1];
if ($num_subtags == 2) {
return $new_string;
}
// process all other subtags, index 2 and up
for ($i = 2; $i < $num_subtags; $i++) {
$length = strlen($subtags[$i]);
if ($length == 0 || $length > 8 || !ctype_alnum($subtags[$i])) {
return $new_string;
}
if (!ctype_lower($subtags[$i])) {
$subtags[$i] = strtolower($subtags[$i]);
}
$new_string .= '-' . $subtags[$i];
}
return $new_string;
}
}
// vim: et sw=4 sts=4