wp-includes/load.php:358Checks whether the site is in the given development mode.
$modestringboolfunction wp_is_development_mode( $mode ) { $current_mode = wp_get_development_mode(); if ( empty( $current_mode ) ) { return false; } // Return true if the current mode encompasses all modes. if ( 'all' === $current_mode ) { return true; } // Return true if the current mode is the given mode. return $mode === $current_mode;}Introduced in 6.3.0. 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.