"String substitution" and "Template Settings" (application/config.php)

View output string content substitution
' view_replace_str '       = [
    ' __public__ '         = '/public/',
    ' __root__ '              = '/',
],

Template settings:

Add under Template:

' layout_on ' = true,
' Layout_name ' and ' layout ',
' Layout_item ' = ' [__replace__] '

Meanwhile layout.html changed to [__replace__]

{include file= "Templet/header"/}
[__REPLACE__]
{include file= "Templet/footer"/}

or layout.html.

{include file= "Templet/header"/}
{__content__}
{include file= "Templet/footer"/}
In addition, use index.html to add
{Layout name= "layout"/}
The layout label is defined at the beginning of the file, indicating that the current template is using layouts, the layout template file is layout.html,
{__content__} in the layout template is automatically replaced with the parsed index.html content.

"String substitution" and "Template Settings" (application/config.php)