*/
function nl2br_escaped($html)
{
- return str_replace('>','>',str_replace('<','<',nl2br($html)));
+ return str_replace('>', '>', str_replace('<', '<', nl2br($html)));
}
/**
$date = DateTime::createFromFormat($format, $string);
return $date && $date->format($string) == $string;
}
+
+/**
+ * Generate a header location from HTTP_REFERER.
+ * Make sure the referer is Shaarli itself and prevent redirection loop.
+ *
+ * @param string $referer - HTTP_REFERER.
+ * @param string $host - Server HOST.
+ * @param array $loopTerms - Contains list of term to prevent redirection loop.
+ *
+ * @return string $referer - final referer.
+ */
+function generateLocation($referer, $host, $loopTerms = array())
+{
+ $final_referer = '?';
+
+ // No referer if it contains any value in $loopCriteria.
+ foreach ($loopTerms as $value) {
+ if (strpos($referer, $value) !== false) {
+ return $final_referer;
+ }
+ }
+
+ // Remove port from HTTP_HOST
+ if ($pos = strpos($host, ':')) {
+ $host = substr($host, 0, $pos);
+ }
+
+ if (!empty($referer) && strpos(parse_url($referer, PHP_URL_HOST), $host) !== false) {
+ $final_referer = $referer;
+ }
+
+ return $final_referer;
+}
+
+/**
+ * Checks the PHP version to ensure Shaarli can run
+ *
+ * @param string $minVersion minimum PHP required version
+ * @param string $curVersion current PHP version (use PHP_VERSION)
+ *
+ * @throws Exception the PHP version is not supported
+ */
+function checkPHPVersion($minVersion, $curVersion)
+{
+ if (version_compare($curVersion, $minVersion) < 0) {
+ throw new Exception(
+ 'Your PHP version is obsolete!'
+ .' Shaarli requires at least PHP '.$minVersion.', and thus cannot run.'
+ .' Your PHP version has known security vulnerabilities and should be'
+ .' updated as soon as possible.'
+ );
+ }
+}
?>