protected function initializeBuiltInEscapers()
{
$that = $this;
$this->escapers = ['html' => function ($value) use($that) {
// Numbers and Boolean values get turned into strings which can cause problems
// with type comparisons (e.g. === or is_int() etc).
return is_string($value) ? htmlspecialchars($value, ENT_QUOTES | ENT_SUBSTITUTE, $that->getCharset(), false) : $value;
}, 'js' => function ($value) use($that) {
if ('UTF-8' != $that->getCharset()) {
$value = $that->convertEncoding($value, 'UTF-8', $that->getCharset());
}
$callback = function ($matches) use($that) {
$char = $matches[0];
// \xHH
if (!isset($char[1])) {
return '\\x' . substr('00' . bin2hex($char), -2);
}
// \uHHHH
$char = $that->convertEncoding($char, 'UTF-16BE', 'UTF-8');
return '\\u' . substr('0000' . bin2hex($char), -4);
};
if (null === ($value = preg_replace_callback('#[^\\p{L}\\p{N} ]#u', $callback, $value))) {
throw new \InvalidArgumentException('The string to escape is not a valid UTF-8 string.');
}
if ('UTF-8' != $that->getCharset()) {
$value = $that->convertEncoding($value, $that->getCharset(), 'UTF-8');
}
return $value;
}];
self::$cached = [];
}
