I am trying to set a javascript variable to be equal to the output of php code:

var name = '<?php global $email; echo json_encode(passthru("python Backend/User/getName.py $email"));?>';

When this runs, it returns the correct value, but it also attaches a null value to it:

var name = 'name
null';

This causes the code to take the value as null and not as the name returned.

CodePudding user response：

As stated, passthru returns null on success and false on failure.

What you are looking to get is the content of the file so a simple way to do it is to just use output buffering.

You can have a simple function to return the value of your script like so:

<?php
function getPassthruValue(string $command)
{
    ob_start();
    passthru($command);
    $returnValue = ob_get_contents();
    ob_end_clean();
    return $returnValue;
}
global $email;
$value = getPassthruValue("python Backend/User/getName.py $email");
?>
<script>
    var passthruValue = "<?= $value ?>"
</script>

<?= === <?php echo just incase you didn't know what the shorthand annotation means.

This will grab the value of your python script and then set it to a js value.

This will return an empty string on failure so you may need to put some exception handling in depending on your needs.