$class = false;
$namespace = false;
$tokens = token_get_all(file_get_contents($file));
+
+ if (1 === count($tokens) && T_INLINE_HTML === $tokens[0][0]) {
+ throw new \InvalidArgumentException(sprintf('The file "%s" does not contain PHP code. Did you forgot to add the "<?php" start tag at the beginning of the file?', $file));
+ }
+
for ($i = 0; isset($tokens[$i]); ++$i) {
$token = $tokens[$i];