src/Tokenizer/Tokens.php
public function isMonolithicPhp()
    {
        $size = $this->count();

        if (0 === $size) {
            return false;
        }

        if (self::isLegacyMode()) {
            // If code is not monolithic there is a great chance that first or last token is `T_INLINE_HTML`:
            if ($this[0]->isGivenKind(T_INLINE_HTML) || $this[$size - 1]->isGivenKind(T_INLINE_HTML)) {
                return false;
            }

            for ($index = 1; $index < $size; ++$index) {
                if ($this[$index]->isGivenKind([T_INLINE_HTML, T_OPEN_TAG, T_OPEN_TAG_WITH_ECHO])) {
                    return false;
                }
            }

            return true;
        }

        if ($this->isTokenKindFound(T_INLINE_HTML)) {
            return false;
        }

        return 1 >= ($this->countTokenKind(T_OPEN_TAG) + $this->countTokenKind(T_OPEN_TAG_WITH_ECHO));
    }
public function isMonolithicPhp()
    {
        $size = $this->count();

        if (0 === $size) {
            return false;
        }

        if (self::isLegacyMode()) {
            // If code is not monolithic there is a great chance that first or last token is `T_INLINE_HTML`:
            if ($this[0]->isGivenKind(T_INLINE_HTML) || $this[$size - 1]->isGivenKind(T_INLINE_HTML)) {
                return false;
            }

            for ($index = 1; $index < $size; ++$index) {
                if ($this[$index]->isGivenKind([T_INLINE_HTML, T_OPEN_TAG, T_OPEN_TAG_WITH_ECHO])) {
                    return false;
                }
            }

            return true;
        }

        if ($this->isTokenKindFound(T_INLINE_HTML)) {
            return false;
        }

        return 1 >= ($this->countTokenKind(T_OPEN_TAG) + $this->countTokenKind(T_OPEN_TAG_WITH_ECHO));
    }
Checks for monolithic PHP code.

Checks that the code is pure PHP code, in a single code block, starting
with an open tag.

@return bool