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WordPress custom plugin will display on post but will not print

Here is a simplified version of the plugin. It does what it is supposed to do. It displays the modified time like Modified: February 23, 2016.

<?php
/**

 */
function modified_date($content) {
    $post = get_post();
    if (is_page()) {
    }
    else {
        $origdate = get_the_time();
        $moddate = get_the_modified_time();
        if ($origdate != $moddate) {
            echo '<div class="mod" style="line-height: 1.2em; position: relative; text-align: right;"><strong>Modified:</strong> ';
            echo the_modified_date();
            echo '</div>';
        }
    }
    return $content;
}
add_filter('the_content', 'modified_date');
?>

I have tried add_action and add_shortcode with adjustments. Both displayed the modified date on the post, but not in print.

I have tried many plugins to print my post, but none pick up the modified time. The latest plugin, I have used Print My Blog displays everything I want to see in a print except the modified time. The easiest Print My Blog configuration that works (again except for the modified time) is:

Print My Blog > Settings > Print Buttons > select Posts

Then Customize Buttons > select Print

Is there something that I am missing? Any help would greatly be appreciated.

Tags:

2

Answers


  1. Chosen as BEST ANSWER
    0 
    <?php
/**

 */
function modified_date($content) {
    if (is_singular('page')) {
        return $content;
    }
    else {
        $origdate = get_the_time();
        $moddate = get_the_modified_time();
        if ($origdate != $moddate) {
            $content = '<div class="mod" style="line-height: 1.2em; position: relative; text-align: right;"><strong>Modified:</strong> '. get_the_modified_date() .'</div>'.$content;
            return $content;
        }
    }
}
add_filter('the_content', 'modified_date');
?>

  2. 0

    Beware that in your function if $origdate == $moddate you are not returning anything and the page will be empty. It’s better to return $content at the end of the function to make sure it returns a value.

    <?php
function modified_date($content) {
    if( ! is_singular('page')) {
        $origdate = get_the_time();
        $moddate = get_the_modified_time();
        if ($origdate != $moddate) {
            $content = '<div class="mod" style="line-height: 1.2em; position: relative; text-align: right;"><strong>Modified:</strong> '. get_the_modified_date() .'</div>'.$content;
        }
    }
    return $content;
}
add_filter('the_content', 'modified_date');
?>
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