wp-includes/load.php:938Redirects to the installer if WordPress is not installed.
function wp_not_installed() { if ( is_blog_installed() || wp_installing() ) { return; } nocache_headers(); if ( is_multisite() ) { wp_die( __( 'The site you have requested is not installed properly. Please contact the system administrator.' ) ); } require ABSPATH . WPINC . '/kses.php'; require ABSPATH . WPINC . '/pluggable.php'; $link = wp_guess_url() . '/wp-admin/install.php'; wp_redirect( $link ); die();}Introduced in 3.0.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/load.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.