Modx IF返回空白页面

Question

I am trying to check server date and time to compate with date TV of resource, but i always get blank page when I try to check in IF statment, here is what i need.

I have snippet like this

<?php
function getDatetimeNow() {
  $tz_object = new DateTimeZone('Europe/Belgrade');
  $datetime = new DateTime();
  $datetime->setTimezone($tz_object);
  return $datetime->format('Y\-m\-d\ h:i:s');
}

$currentDate = getDatetimeNow();

$dtA = new DateTime($currentDate);
$dtB = new DateTime($date);

if ( $dtA > $dtB ) {
  $active = 0;
  return $active;
}
else {
  $active = 1;
  return $active;
}

But when on page if i try like this

[[!CheckCurrentDate? &date=`[[*DatumIsteka]]`]]

I got 1 or 0 based on TV value *DatumIsteka, all is working ok, but when i try to compare like this

[[!If?
    &subject=`[[!CheckCurrentDate? &date=`[[*DatumIsteka]]`]]`
    &operator=`equals`
    &operand=`0`
    &then=`<script>
    $("#tab3").html("<p>U Pripremi</p>");
    </script>`
    ]]

I got white page of resource?? What can be the problem, any help will be nice :)

Answer 1

change your operator to not equal and your operand to 1 - modx TVs don't actually exist unless they are populated [even if they have a default defined] you may be getting a null value or error in your snippet if the TV is not populated.

OR

echo your return value,

if ( $dtA > $dtB ) {
  $active = 0;
}
else {
  $active = 1;
}

echo $active;

return; 

IF may be having issues interpreting the return values as boolean vs. string?

You can also change your snippet to retrieve the current resources DatumIsteka value and then use output modifiers.

or something like this:

<?php
function getDatetimeNow() {
  $tz_object = new DateTimeZone('Europe/Belgrade');
  $datetime = new DateTime();
  $datetime->setTimezone($tz_object);
  return $datetime->format('Y\-m\-d\ h:i:s');
}

$currentDate = getDatetimeNow();

$dtA = new DateTime($currentDate);

$date = $modx->resource->getTVValue('DatumIsteka');

$dtB = new DateTime($date);

if ( $dtA > $dtB ) {
  $active = $modx->getChunk('chunkName');
// chunkName = <script>$("#tab3").html("<p>U Pripremi</p>");</script>
}
else {
  $active = 1;
}

echo $active; // you have to echo it if you are passing a string

return;