php bootstrap error when page load

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PHP

bootstrap

php bootstrap json data not loading on page load

this is first error
--------------------------------------

<script type="text/javascript">
            // bootstrap variables

            var bootstrap = {
                useProxy: '<?= $use_proxy ?>',
                apiBaseUrl: '<?= $api_base_url ?>',
                url: '<?= $url ?>',
                db: '<?= $client_db ?>',
                name: '<?= $client_name ?>',
                shortName: '<?= $client_short_name ?>'
            };

            if (<?= strlen($ag_filters) > 0 ?>) bootstrap.agFilters = JSON.parse('<?= $ag_filters ?>');
uncaught syntaxerror unexpected token (here comes this error)

            if (<?= strlen($cr_filters) > 0 ?>) bootstrap.crFilters = JSON.parse('<?= $cr_filters ?>');

this is second error
----------------------------------
bootstrap is not defined

and yeah this already running on another server but I transfer in new server so it not working