可以在标头中使用if语句

if ( is_home() ) {
    <img src="/home-image.png"/>
} else {
   <img src="/other-image.png"/>
}

// When any single Page is being displayed.
is_page();

// When Page 42 (ID) is being displayed.
is_page( 42 );

// When the Page with a post_title of "Contact" is being displayed.
is_page( \'Contact\' );

// When the Page with a post_name (slug) of "about-me" is being displayed.
is_page( \'about-me\' );