PHP calculation using ACF fields

written by: Jeff McNear

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PHP calculation using ACF fields

Recently I was faced with a situation where I needed to add a value to an arithmetic equation using two values from ACF fields here is how I did it:

          <?php if( get_field('grill_btu') ): ?>
          <?php
          $btu = get_field('grill_btu');
          $pcap = get_field('grill_primary_capacity');
          echo " ". round($btu/$pcap, 2) ."<br />";
          ?>
          <?php endif; ?>

First I established that the “grill_btu” field was populated:

          <?php if( get_field('grill_btu') ): ?>

Then the two fields needed to be declared as variables:

          $btu = get_field('grill_btu');
          $pcap = get_field('grill_primary_capacity');

With that done I could express those values in an equation:

  echo " ". round($btu/$pcap, 2) ."<br />";

To fine out more about PHP equations see: https://www.php.net/manual/en/ref.math.php

Because we didn’t want to show more than 2 decimal points, I used the sound function – see: https://www.php.net/manual/en/function.round.php