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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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16 | /** |
17 | * Filter whether to enable the 'expand' functionality in the post editor. |
18 | * |
19 | * @since 4.0.0 |
20 | * |
21 | * @param bool $expand Whether to enable the 'expand' functionality. Default true. |
22 | */ |
23 | if ( post_type_supports( $post_type, 'editor' ) && ! wp_is_mobile() && |
24 | ! ( $is_IE && preg_match( '/MSIE [5678]/', $_SERVER['HTTP_USER_AGENT'] ) ) && |
25 | apply_filters( 'wp_editor_expand', true ) ) { |
26 |
|
27 | wp_enqueue_script('editor-expand'); |
28 | $_wp_editor_expand = ( get_user_setting( 'editor_expand', 'on' ) === 'on' ); |
29 | } |
30 |
|
31 | if ( wp_is_mobile() ) |
32 | wp_enqueue_script( 'jquery-touch-punch' ); |
33 |
|
34 | /** |