Zephir\Passes\LocalContextPass::passStatementBlock PHP Method

    public function passStatementBlock(array $statements)
    {
        foreach ($statements as $statement) {
            switch ($statement['type']) {
                case 'let':
                    $this->passLetStatement($statement);
                    break;
                case 'echo':
                    if (isset($statement['expressions'])) {
                        foreach ($statement['expressions'] as $expr) {
                            $this->passExpression($expr);
                        }
                    }
                    break;
                case 'declare':
                    $this->declareVariables($statement);
                    break;
                case 'if':
                    if (isset($statement['expr'])) {
                        $this->passExpression($statement['expr']);
                    }
                    if (isset($statement['statements'])) {
                        $this->passStatementBlock($statement['statements']);
                    }
                    if (isset($statement['else_statements'])) {
                        $this->passStatementBlock($statement['else_statements']);
                    }
                    break;
                case 'switch':
                    if (isset($statement['expr'])) {
                        $this->passExpression($statement['expr']);
                    }
                    if (isset($statement['clauses'])) {
                        foreach ($statement['clauses'] as $clause) {
                            if (isset($clause['expr'])) {
                                $this->passExpression($clause['expr']);
                            }
                            if (isset($clause['statements'])) {
                                $this->passStatementBlock($clause['statements']);
                            }
                        }
                    }
                    break;
                case 'while':
                case 'do-while':
                    if (isset($statement['expr'])) {
                        $this->passExpression($statement['expr']);
                    }
                    if (isset($statement['statements'])) {
                        $this->passStatementBlock($statement['statements']);
                    }
                    break;
                case 'for':
                    if (isset($statement['expr'])) {
                        $this->passExpression($statement['expr']);
                    }
                    if (isset($statement['value'])) {
                        $this->markLastUse($statement['value'], $statement);
                        $this->markVariableNoLocal($statement['value']);
                        $this->increaseMutations($statement['value']);
                    }
                    if (isset($statement['key'])) {
                        $this->markLastUse($statement['key'], $statement);
                        $this->markVariableNoLocal($statement['key']);
                        $this->increaseMutations($statement['key']);
                    }
                    if (isset($statement['statements'])) {
                        $this->passStatementBlock($statement['statements']);
                    }
                    break;
                case 'return':
                    if (isset($statement['expr'])) {
                        $this->passExpression($statement['expr']);
                    }
                    break;
                case 'loop':
                    if (isset($statement['statements'])) {
                        $this->passStatementBlock($statement['statements']);
                    }
                    break;
                case 'try-catch':
                    if (isset($statement['statements'])) {
                        $this->passStatementBlock($statement['statements']);
                    }
                    if (isset($statement['catches'])) {
                        foreach ($statement['catches'] as $catch) {
                            if (isset($catch['variable'])) {
                                $this->markVariableNoLocal($catch['variable']['value']);
                                $this->increaseMutations($catch['variable']['value']);
                            }
                            if (isset($catch['statements'])) {
                                $this->passStatementBlock($catch['statements']);
                            }
                        }
                    }
                    break;
                case 'throw':
                    if (isset($statement['expr'])) {
                        $this->passExpression($statement['expr']);
                    }
                    $this->lastCallLine = $statement['line'];
                    break;
                case 'fetch':
                    $this->passExpression($statement['expr']);
                    break;
                case 'mcall':
                case 'scall':
                case 'fcall':
                case 'require':
                    if ($statement['expr']['type'] == 'mcall') {
                        if (isset($statement['expr']['variable'])) {
                            if ($statement['expr']['variable']['type'] == 'variable') {
                                $this->markVariableNoLocal($statement['expr']['variable']['value']);
                            }
                        }
                    }
                    $this->passCall($statement['expr']);
                    $this->lastCallLine = $statement['line'];
                    break;
                case 'unset':
                    if ($statement['expr']['type'] == "array-access") {
                        if ($statement['expr']['left']['type'] == 'variable') {
                            $this->markVariableNoLocal($statement['expr']['left']['value']);
                            $this->increaseMutations($statement['expr']['left']['value']);
                        }
                    } else {
                        if ($statement['expr']['type'] == "list") {
                            if ($statement['expr']['left']['type'] == 'array-access') {
                                if ($statement['expr']['left']['left']['type'] == 'variable') {
                                    $this->markVariableNoLocal($statement['expr']['left']['left']['value']);
                                    $this->increaseMutations($statement['expr']['left']['left']['value']);
                                }
                            }
                        }
                    }
                    $this->lastUnsetLine = $statement['line'];
                    break;
                case 'break':
                case 'continue':
                case 'empty':
                case 'cblock':
                case 'comment':
                    break;
                default:
                    echo 'Statement=', $statement['type'], PHP_EOL;
            }
        }
    }