/**
* Removes unnecessary blocks of PHP code.
* @param string
* @return string
*/
private static function optimizePhp($source)
{
$res = $php = '';
$tokens = token_get_all($source);
$iterator = new SmartCachingIterator(token_get_all($source));
foreach ($iterator as $token) {
if (is_array($token)) {
if ($token[0] === T_INLINE_HTML) {
$res .= $token[1];
} elseif ($token[0] === T_CLOSE_TAG) {
$next = $iterator->getNextValue();
if (substr($res, -1) !== '<' && preg_match('#^<\\?php\\s*$#', $php)) {
$php = '';
// removes empty (?php ?), but retains ((?php ?)?php
} elseif (is_array($next) && $next[0] === T_OPEN_TAG) {
// remove ?)(?php
$ch = substr(rtrim($php), -1);
if ($ch !== ';' && $ch !== '{' && $ch !== '}' && $ch !== ':' && $ch !== '/') {
$php .= ';';
}
if (substr($next[1], -1) === "\n") {
$php .= "\n";
}
$iterator->next();
} else {
$res .= preg_replace('#;?(\\s)*$#', '$1', $php) . $token[1];
// remove last semicolon before ?)
$php = '';
}
} else {
$php .= $token[1];
}
} else {
$php .= $token;
}
}
return $res . $php;
}
