WordPressテーマ『ストーク』を使ったアドセンスのカスタマイズ。設置方法やコードまとめ

Fatal error: Uncaught Error: Call to undefined function is_mobile() in /home/lovewifelife/love-wife-life.com/public_html/second/wp-content/themes/swell_child/functions.php:90 Stack trace: #0 /home/lovewifelife/love-wife-life.com/public_html/second/wp-includes/shortcodes.php(393): showads('', '', 'adsense') #1 [internal function]: do_shortcode_tag(Array) #2 /home/lovewifelife/love-wife-life.com/public_html/second/wp-includes/shortcodes.php(265): preg_replace_callback('/\\[(\\[?)(pc|sp|...', 'do_shortcode_ta...', '<p>\xE3\x83\x96\xE3\x83\xAD\xE3\x82\xB0\xE3\x82\x92...') #3 /home/lovewifelife/love-wife-life.com/public_html/second/wp-includes/class-wp-hook.php(308): do_shortcode('<p>\xE3\x83\x96\xE3\x83\xAD\xE3\x82\xB0\xE3\x82\x92...') #4 /home/lovewifelife/love-wife-life.com/public_html/second/wp-includes/plugin.php(205): WP_Hook->apply_filters('<p>\xE3\x83\x96\xE3\x83\xAD\xE3\x82\xB0\xE3\x82\x92...', Array) #5 /home/lovewifelife/love-wife-life.com/public_html/second/wp-includes/post-template.php(255): apply_filters('the_con in /home/lovewifelife/love-wife-life.com/public_html/second/wp-content/themes/swell_child/functions.php on line 90