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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.
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61 | * Preload common data by specifying an array of REST API paths that will be preloaded. |
62 | * |
63 | * Filters the array of paths that will be preloaded. |
64 | * |
65 | * @since 5.0.0 |
66 | * |
67 | * @param string[] $preload_paths Array of paths to preload. |
68 | * @param WP_Post $post Post being edited. |
69 | */ |
70 | $preload_paths = apply_filters( 'block_editor_preload_paths', $preload_paths, $post ); |
71 |
|
72 | /* |
73 | * Ensure the global $post remains the same after API data is preloaded. |
74 | * Because API preloading can call the_content and other filters, plugins |
75 | * can unexpectedly modify $post. |
76 | */ |
77 | $backup_global_post = clone $post; |
78 |
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79 | $preload_data = array_reduce( |