Support » Theme: Twenty Fourteen » Change thumbnail size in functions.php

  • Hi!

    In my empty child functions.php, I want to make a change to this code from the original functions.php:

    set_post_thumbnail_size( 672, 372, true );

    According to the codex, I am supposed to make a conditional clause:

    if ( ! function_exists( 'theme_special_nav' ) ) {
        function theme_special_nav() {
            //  Do something.
        }
    }

    Unfortunately, I am a PHP beginner. Could someone help me phrase it?

    Best regards
    Leo

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