Php statement within javascript statement

Question

I would like to include the following php variable ($crs_sub2) inside my following javascript statement:

<script>
 document.getElementById("checkbox1").addEventListener('change', function() {
 var crs_category1 = document.getElementById("checkbox1").checked;
 if (crs_category1 === true){
 document.getElementById('checkboxLoading').innerHTML = ''; 
 } else {
window.open ('searchPage.php?user_query=$crs_sub2&search=search','_self',false);
</script>

my issue is as follow: the variable crs_sub2 refers to the following php statement:

$search_query2 = $_GET['crs_category'];
$get_cats = "select DISTINCT cat_subc1,cat_subc2,cat_subc3,cat_subc4,cat_subc5,cat_subc6,cat_subc7,cat_subc8,cat_subc9,cat_subc10,cat_subc11,cat_subc12,cat_subc13,cat_subc14,cat_subc15,cat_subc16,cat_subc17,cat_subc18 from categories where (cat_title like '%$search_query2%')";
$run_cats = mysqli_query($con, $get_cats);
while ($row_cats=mysqli_fetch_array($run_cats)) {
 $crs_sub2 = $row_cats['cat_subc2'];
}

Answer 1

use like this

window.open ('searchPage.php?user_query=<?php echo $crs_sub2; ?>&search=search','_self',false);

Answer 2

You may try as follows (if both javascript and php are on the same page)

 $search_query2 = $_GET['crs_category'];
 $get_cats = "select DISTINCT cat_subc1,cat_subc2,cat_subc3,cat_subc4,cat_subc5,cat_subc6,cat_subc7,cat_subc8,cat_subc9,cat_subc10,cat_subc11,cat_subc12,cat_subc13,cat_subc14,cat_subc15,cat_subc16,cat_subc17,cat_subc18 from categories where (cat_title like '%$search_query2%')";
 $run_cats = mysqli_query($con, $get_cats);
 while ($row_cats=mysqli_fetch_array($run_cats)){
 $crs_sub2 = $row_cats['cat_subc2'];
 ?>
<script>
 document.getElementById("checkbox1").addEventListener('change', function() {
 var crs_category1 = document.getElementById("checkbox1").checked;
 if (crs_category1 === true){
 document.getElementById('checkboxLoading').innerHTML = ' '; 
 } else {
 window.open ('searchPage.php?user_query=<?php echo $crs_sub2; ?>&search=search','_self',false);}
</script>
 <?php
 }

Hope this helps