Using printf & sprintf In WordPress

If you want to add a link outside your editor, you’ll need to code it into a custom function or add it directly in a theme file. Otherwise, you could create a new widget area and add the HTML for the link into the widget. Not a very efficient way to add links in your theme, but works nonetheless.

To add your links in a custom function, you could create the link in your editor and output your text to the front end using echo:

add_action('loop_start','text_links_the_wrong_way');
function text_links_the_wrong_way() {
echo'<div class="your-class"><a href="http://example.com">Link Text</a></div>';
}

A better and more efficient way is to use printf in your code like this:

add_action('loop_start','code_text_links_correctly');
function code_text_links_correctly() {		
	printf( '<a href="%s" class="your-class">' . __( 'Your link text here' ) . '</a>',  __( 'http://example.com' ) ); 
}

Or, directly in a file like this:

<?php printf( '<a href="%s" class="your-class">' . __( 'Your link text here' ) . '</a>',  __( 'http://example.com' ) ); ?>

printf without the %s placeholder.

add_action( 'loop_start', 'printf_demo' );
function printf_demo() {
printf( __( 'If left unchecked, the post author link will not display globally.', 'genesis' ) );
}

Using printf with wp_kses and a variable as your URL

$url = $audio_url;
$link = sprintf( wp_kses( __( '<a href="%s">Download</a>', '$text_domain' ), array(  'a' => array( 'href' => array() ) ) ), esc_url( $url ) );
echo $link;

Or, when hard coding a URL

$url = 'http://example.com';
$link = sprintf( wp_kses( __( '<a href="%s">Download</a>', '$text_domain' ), array(  'a' => array( 'href' => array() ) ) ), esc_url( $url ) );
echo $link;

Printf with $variable

printf( '<a href="%s" class="button download">' . __( 'Download' ) . '</a>', $audio_url );

sprintf With Images

add_action( 'genesis_after_header', 'after_header_banner' );
function after_header_banner() {
    $output = sprintf( '<img class="after-header-banner" src="%s" alt="%s" />', get_stylesheet_directory_uri() .'/images/bg1.jpg', get_the_title( $post->ID ) );
    echo $output;
}

printf with images

add_action( 'genesis_after_header', 'after_header_banner' );
function after_header_banner() {
    printf( '<img class="after-header-banner" src="%s" alt="%s" />', get_stylesheet_directory_uri() .'/images/bg1.jpg', get_the_title( $post->ID ) );
}

Linking Image From Images Folder To Post Permalink

add_action( 'genesis_after_header', 'after_header_banner' );
function after_header_banner() {
    $output = sprintf( '<a href="%s" class="after-header-banner"><img src="%s" alt="%s" /></a>', get_permalink(), get_stylesheet_directory_uri() .'/images/bg1.jpg', get_the_title( $post->ID ) );
    echo $output;
}

Linking Featured Images To Permalink

if ( $image = genesis_get_image( array( 'format' => 'url', 'size' => 'thumbnail' ) ) ) {
printf( '<a href="%s" class="entry-image"><img src="%s" alt="%s" /></a>', get_permalink(), $image, the_title_attribute( 'echo=0' ) );
}

Linking Image To Home URL

add_action( 'genesis_after_header', 'from_child_themes_images_folder' );
function from_child_themes_images_folder() {
    $image = sprintf( '%s/images/default.png', get_stylesheet_directory_uri() );
    printf( '<a href="%s" class="your-class"><img src="%s"></a>', esc_url( home_url( '/' ) ), $image );
}

Linking Image From Customizer To Home URL

add_action( 'genesis_header', 'image_from_customizer' );
function image_from_customizer() {
    printf( '<a href="%s" class="your-class"><img src="%s"></a>', esc_url( home_url( '/' ) ), get_header_image() );
}

Use with ternary

printf( genesis_html5() ? '<p class="entry-meta">%s</p>' : '<p class="byline post-info">%s</p>', do_shortcode( $post_info ) );

Using printf & sprintf In WordPress – 12 Code Examples

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