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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 |
---|---|
1062 | } |
1063 | } else { |
1064 | $constraint = ''; |
1065 | } |
1066 |
|
1067 | $post_title = esc_attr($post->post_title); |
1068 |
|
1069 | $icon = "<img src='$src' title='$post_title' alt='$post_title' $constraint/>"; |
1070 |
|
1071 | return apply_filters( 'attachment_icon', $icon, $post->ID ); |
1072 | } |
1073 |
|
1074 | /** |
1075 | * Retrieve HTML content of image element. |
1076 | * |
1077 | * @since 2.0.0 |
1078 | * @deprecated Use {@link wp_get_attachment_image()} |
1079 | * @see wp_get_attachment_image() Use instead. |
1080 | * |