This is how you create Shortcode in WordPress from the function.php
// [bartag foo="foo-value"] function bartag_func( $atts ) { $a = shortcode_atts( array( 'foo' => 'something', 'bar' => 'something else', ), $atts ); return "foo = {$a['foo']}"; } add_shortcode( 'bartag', 'bartag_func' ); //Show the short code in the site
[bartag foo="bar" bar="bing"]