www: more php print issues

src/www/diag_logs_filter_summary.php

@@ -196,7 +196,7 @@ include("head.inc"); ?>
             ;
 
           d3.select("[id='"+ selected_id + "'].piechart svg")
-              .datum(<? echo json_encode($data); ?>[selected_id])
+              .datum(<?= json_encode($data) ?>[selected_id])
               .transition().duration(350)
               .call(chart);
 

src/www/interfaces_bridge_edit.php

@@ -326,7 +326,7 @@ $(document).ready(function() {
                         <select name="stp[]" class="selectpicker" multiple="multiple" size="3" data-live-search="true">
 <?php
                         foreach ($ifacelist as $ifn => $ifdescr):?>
-                          <option value="<?$ifn;?>" <?=!empty($pconfig['stp']) && in_array($ifn, $pconfig['stp']) ? "selected=\"selected\"" : "";?> >
+                          <option value="<?= $ifn ?>" <?= !empty($pconfig['stp']) && in_array($ifn, $pconfig['stp']) ? 'selected="selected"' : '' ?> >
                               <?=$ifdescr;?>
                           </option>
 <?php

src/www/interfaces_ppps_edit.php

@@ -694,7 +694,7 @@ include("head.inc");
                       <tr style="display:none" class="act_show_advanced">
                         <td><a id="help_for_vjcomp" href="#" class="showhelp"><i class="fa fa-info-circle"></i></a> <?= gettext("Compression"); ?></td>
                         <td>
-                          <input type="checkbox" value="on" id="vjcomp" name="vjcomp" <?!empty($pconfig['vjcomp']) ? "checked=\"checked\"" :""; ?> />
+                          <input type="checkbox" value="on" id="vjcomp" name="vjcomp" <?= !empty($pconfig['vjcomp']) ? 'checked="checked"' : '' ?> />
                           <?= gettext("Disable vjcomp(compression) (auto-negotiated by default)."); ?>
                           <div class="hidden" for="help_for_vjcomp">
                             <?=gettext("This option enables Van Jacobson TCP header compression, which saves several bytes per TCP data packet. " .

src/www/system_general.php

@@ -430,8 +430,8 @@ include("head.inc");
                             if(is_ipaddrv6(lookup_gateway_ip_by_name($pconfig[$dnsgw])) && is_ipaddrv4($gwitem['gateway'])) {
                               continue;
                             }?>
-                            <option value="<?=$gwname;?>" <?=$pconfig[$dnsgw] == $gwname ? "selected=\"selected\"" : "" ;?>>
-                              <?=$gwname;?> - <?=$gwitem['friendlyiface'];?> - <?$gwitem['gateway'];?>
+                            <option value="<?=$gwname;?>" <?=$pconfig[$dnsgw] == $gwname ? 'selected="selected"' : '' ?>>
+                              <?=$gwname;?> - <?=$gwitem['friendlyiface'];?> - <?=$gwitem['gateway'];?>
                             </option>
 <?php
                              endforeach;?>