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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )
apply_filters( "hook_name", "what_to_filter" )
.Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
Line | Code |
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80 | /** |
81 | * Filter the default twentysixteen custom header sizes attribute. |
82 | * |
83 | * @since Twenty Sixteen 1.0 |
84 | * |
85 | * @param string $custom_header_sizes sizes attribute |
86 | * for Custom Header. Default '(max-width: 709px) 85vw, |
87 | * (max-width: 909px) 81vw, (max-width: 1362px) 88vw, 1200px'. |
88 | */ |
89 | $custom_header_sizes = apply_filters( 'twentysixteen_custom_header_sizes', '(max-width: 709px) 85vw, (max-width: 909px) 81vw, (max-width: 1362px) 88vw, 1200px' ); |
90 | ?> |
91 | <div class="header-image"> |
92 | <a href="<?php echo esc_url( home_url( '/' ) ); ?>" rel="home"> |
93 | <img src="<?php header_image(); ?>" srcset="<?php echo esc_attr( wp_get_attachment_image_srcset( get_custom_header()->attachment_id ) ); ?>" sizes="<?php echo esc_attr( $custom_header_sizes ); ?>" width="<?php echo esc_attr( get_custom_header()->width ); ?>" height="<?php echo esc_attr( get_custom_header()->height ); ?>" alt="<?php echo esc_attr( get_bloginfo( 'name', 'display' ) ); ?>"> |
94 | </a> |
95 | </div><!-- .header-image --> |
96 | <?php endif; // End header image check. ?> |
97 | </header><!-- .site-header --> |
98 |
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