Using ACF With Associative Arrays

• realph

• January 7, 2014 at 8:49 am

So, I’ve got this conversion chart I’m working with, and have stored its values in a simple array, wherein it lists both UK and US sizes:

$conversion = array(
	"2.5" => "1",
	"2.75" => "2",
	"3.25" => "3",
	"3.5" => "4",
	"3.75" => "5",
	"4" => "6"
);

I’m using Advanced Custom Fields on my WordPress site and am successfully retrieving the UK size via a Select Field. Now that’s exactly what I want, except I also want to retrieve its US value from the $conversion array, so both values are displayed.

I’m using a Repeater field with two child Select Fields (min and max) and a True/False Field (to). My code currently looks something like this:

<?php if( have_rows('repeater') ): ?>

	<?php while( have_rows('repeater') ): the_row();

	$min = get_sub_field('min');
	$max = get_sub_field('max');

	foreach($conversion as $uk => $us) {
		if( get_sub_field('to') == true ) { // if ticked
			if( $min == $uk ) {
				echo $uk . ' ' . $us;
			}
		}

		else {
			if( $min == $uk ) {
				echo $uk . ' ' . $us;
			}
		}
	}

	?>
	<?php endwhile; ?>
<?php endif; ?>

Now I need a way when checking my True/False Field for the page to echo both the UK values ($min and $max) and the US values ($min and $max). Right now it’s only echoing the $min value for the UK and the US.

I’d appreciate any help on how to achieve this. Thanks in advance!

• Elliot

• January 7, 2014 at 1:46 pm

Hi @realph

Looking at your code, you only have logic for $min within the $conversions loop. Could this be why there is no $max output?

• realph

• January 7, 2014 at 1:54 pm

@elliot Yeah, that’s the problem. Can’t work out how to retrieve $min/$max from $uk and $us separately. I’m so close, will bundling them both into a variable help?

• Elliot

• January 7, 2014 at 4:45 pm

Hi @realph

Perhaps you can simplify your code down to:

<?php if( have_rows('repeater') ): ?>

	<?php while( have_rows('repeater') ): the_row();

	$min = get_sub_field('min');
	$max = get_sub_field('max');
	
	echo 'Min = ' . $min . '(UK) ' . $conversion[ $min ] . '(US)';
	echo 'Max = ' . $max . '(UK) ' . $conversion[ $max ] . '(US)';
	
	?>
	<?php endwhile; ?>
<?php endif; ?>

• realph

• January 8, 2014 at 2:03 pm

@elliot Simple is always better! Thanks once again, Elliot!

I had to throw in a conditional argument, though, as the ‘max’ value isn’t always present.

if( get_sub_field('to') == true ) {
echo '<p>Min: ' . $min . 'mm (US' . $conversion[ $min ] . ') &ndash; ' . $max . 'mm (US' . $conversion[ $max ] . ')</p>'; }

else {
echo '<p>Min-Max: ' . $min . 'mm (US' . $conversion[ $min ] . ')</p>'; }

One question I had is how are you pulling the $min variable in $conversion[ $min ]? Or is that simply just grabbing the value from my sub field, matching it in the array and pumping out its associated value?

• Elliot

• January 8, 2014 at 5:32 pm

Hi @realph

You can see in my code, that $min is a variable containing the sub field value of ‘min’. Then, I use this to find the associated conversion value.

Thanks
E

• realph

• January 9, 2014 at 3:39 am

@elliot Thanks for clearing that up for me.