Load JavaScript when condition is true-CodePudding

How do I load a script if a PHP condition is true?

For example, I got an external script called script.js and I wanna load this if it's on the product page of WooCommerce.

I've tried the following but it doesn't work because it prints the code on the page:

<?php 
add_action( 'template_redirect', 'check_product_page' );

function check_product_page() {
   if(is_product()) {
      include ('script.js');
   }
}
?>

If I write the script inside a PHP like the below, it causes a fatal error:

<?php 

echo
'<script type="text/JavaScript"> 
   window.addEventListener("load", function() {
      //some code here...
   })
</script>';
?>

CodePudding user response：

Try this:

<?php
if($condition == true){ 
  echo '<script type="text/javascript" src="script.js"></script>';
}
?>

or:

<?php if($condition == true): ?>
  <script type="text/javascript" src="script.js"></script>
<?php endif; ?>

CodePudding user response：

Actually this works on my side, checkout maybe you have another issue:

    echo '<script type="text/JavaScript"> 
   window.addEventListener("load", function() {
      //some code here...
   })
</script>';