JavaScript function inside echo in PHP script is not calling

Question

I have a problem with calling function "adding" inside "a" tag in eho of PHP script. After click in button function is not calling. I have not any idea. How to solve it?

<?php
 require_once 'connect.php';
 $statement=$db->query('SELECT * FROM Items');
 foreach($statement as $row)
 {
 $item="item_".$row[0];
 $view="view".$row[0];
 $image=$row[1];
 $name=$row[2];
 $price=$row[3];
 $plus="+";
 $minus="-";
 echo "<tr>
 <td class='cart_product'>
 <a href=''><img src='images/cart/$image' alt=''></a>
 </td>
 <td class='cart_description'>
 <h4><a href=''>$name</a></h4>
 </td>
 <td class='cart_price'>
 <p>$$price</p>
 </td>
 <td class='cart_quantity'>
 <div class='cart_quantity_button'>
 <a class='cart_quantity_up' href='' onclick='adding($plus, $item);'> + </a>
 <input class='cart_quantity_input' type='text' name=$item id=$item value='0' autocomplete='off' size='2'>
 <a class='cart_quantity_down' href='javascript:adding($minus, $item); sumitem($item, $price, $view);'> - </a>
 </div>
 </td>
 <td class='cart_total'>
 <p style='width: 5em' class='cart_total_price' id=$view >0ドル</p>
 </td>
 <td class='cart_delete'>
 <a class='cart_quantity_delete' href='javascript:reset($item, $view)'><i class='fa fa-times'></i></a>
 </td>
 </tr>";
 }
 ?>

• Adam Brinded: How do you know the JavaScript function isn’t invoking? Are you clicking the ‘+’ or on the parent div?

Answer 1

You can call JavaScript function and send variables to it like this:

<script>
function myFunc(var1){
 alert(var1);
}
</script>
<?php
 $var1= "\"test string\"";
 echo "<a href='' onclick='myFunc($var1);'>Link to Click</a>";
?>

your variables sending is wrong.

• Adam Brinded: He is echoing a whole block of HTML. The variables are being passed in OPs code in exactly the same way as your example.
• SajjadSo: The difference is here: $var1= "\"test string\""
• Krzysztof Piórkowski: Thank you, that's helped so much. Why I need to use this form?
• SajjadSo: your welcome ;) because the '+' and other string variables must be in the quotations, so the js function can get the string values correctly, otherwise js function get those as non-string variables and values don't have any mean to function.
• Adam Brinded: @SajjadSo yes, I see now what you’re saying. In OPs original post he’s not passing string values to the JS function. Good spot!