显示/隐藏带有标题的自定义 php 字段

Question

I want to display a custom field we have [using the Estatik wordpress real estate plugin] if the database field has a value and hide that if it is empty. I can get the field to display and hide if empty or filled out, but, I cannot display the text: "Year built" when the year is filled out:

<?php if( es_the_property_field('year-built1594411179f5f08c8ab6ff14') ): ?>
    <p>Year built: <?php es_the_property_field('year-built1594411179f5f08c8ab6ff14'); ?></p>
<?php endif; ?>

What can i change the code above to achieve:

If the year is filled out, I'd like it to display: Year built: 1994

If the year is left empty, i'd like the paragraph to not print at all

thanks in advance!

Answer 1

For most data in WordPress, there are the_[…]() and get_the_[…]() style functions. Generally the the_ functions will output the data, and the get_the_ functions will return . Most plugins and themes have similar functionality. I downloaded the demo Estatik plugin and noticed that it does have that functionality as well.

In your if statement, you're actually outputting the year field there, and it's not returning a truthy value, so it stops there (otherwise it would show 1994Year Built: 1994 ).

The returning function is es_get_the_property_field( $field, $post_id = 0 );

So, coupling that with a little bit of cleanup (utilizing the before/after arguments of es_the_property_field , you would end up with something like this:

<?php if( es_get_the_property_field('year-built1594411179f5f08c8ab6ff14') ){
    es_the_property_field('year-built1594411179f5f08c8ab6ff14', '<p>Year built: ', '</p>' );
} ?>

HOWEVER:

Here's the whole markup for the es_the_property_field() function:

/**
 * Render property field.
 *
 * @param $field
 * @param string $before
 * @param string $after
 */
function es_the_property_field( $field, $before = '', $after = '' ) {
    $result = es_get_the_property_field( $field );

    echo ! empty( $result ) ? $before . $result . $after : null;
}

This means you could actually drop your if statement altogether, because that function checks to see if it's empty for you. So you could simplify it even further to just:

<?php es_the_property_field( 'year-built1594411179f5f08c8ab6ff14', '<p>Year Built: ', '</p>' ); ?> 

Note: I don't have any personal experience with this plugin, this is all just based on what I found in the estatik/functions.php file.

Answer 2

I am not familiar with the Estatik theme but I can tell you that you could test the content like this.

<?php 

$year_built = es_property_field('year-built1594411179f5f08c8ab6ff14');
if( $year_built != "" || $year_built != false ): ?>
    <p>Year built: <?php echo date("Y", strtotime ($year_built)); ?></p>
<?php endif; ?>

So the two things you were missing was a proper test in the if statement and then echoing out the year_built with the date format. Now this is assuming a few things.

1. that es_the_property_field echos instead of returning which would be a very wordpress thing to do
2. that removing the "the" from that function is the version of that function that returns instead of echos.