В текст javascript вставить php код

$(document).ready(function() {
        $('#blocktrackbar').trackbar({
    onMove : function() {
    document.getElementById("start-price").value = this.leftValue;
    document.getElementById("end-price").value = this.rightValue;   
    },
    width : 160,
    leftLimit : 1000,
    leftValue :<br />
<b>Notice</b>:  Undefined index: start_price in <b>C:\xampp\htdocs\shop\include\block-parametr.php</b> on line <b>12</b><br />
1000,
    rightLimit : 50000,
    rightValue : <br />
<b>Notice</b>:  Undefined index: end_price in <b>C:\xampp\htdocs\shop\include\block-parametr.php</b> on line <b>23</b><br />
30000,
    roundUp : 1000
});
});

 <script type="text/javascript">
$(document).ready(function() {
        $('#blocktrackbar').trackbar({
    onMove : function() {
    document.getElementById("start-price").value = this.leftValue;
    document.getElementById("end-price").value = this.rightValue;   
    },
    width : 160,
    leftLimit : 1000,
    leftValue :<?php 
    
    if ((int)$_GET["start_price"] >=1000 AND (int)$_GET["start_price"] <= 50000)  
    {
       echo (int)$_GET["start_price"];   
    }else
    {
        echo "1000";
    }
          ?>,
    rightLimit : 50000,
    rightValue : <?php  
    
    if ((int)$_GET["end_price"] >=1000 AND (int)$_GET["end_price"] <= 50000)  
    {
       echo (int)$_GET["end_price"];   
    }else
    {
        echo "30000";
    }
    
?>,
    roundUp : 1000
});
});
</script>