upgrader_pre_install filter-hook . WP 2.8.0
Filters the install response before the installation has started.
Returning a truthy value, or one that could be evaluated as a WP_Error will effectively short-circuit the installation, returning that value instead.
Usage
add_filter( 'upgrader_pre_install', 'filter_function_name_4775', 10, 2 );
function filter_function_name_4775( $response, $hook_extra ){
// filter...
return $response;
}
- $response(true|false|WP_Error)
- Response.
- $hook_extra(array)
- Extra arguments passed to hooked filters.
Where the hook is called
wp-admin/includes/class-wp-upgrader.php 490
$res = apply_filters( 'upgrader_pre_install', true, $args['hook_extra'] );
Where in WP core the hook is used WordPress
wp-admin/includes/class-plugin-upgrader.php 211
add_filter( 'upgrader_pre_install', array( $this, 'deactivate_plugin_before_upgrade' ), 10, 2 );
wp-admin/includes/class-plugin-upgrader.php 212
add_filter( 'upgrader_pre_install', array( $this, 'active_before' ), 10, 2 );
wp-admin/includes/class-plugin-upgrader.php 238
remove_filter( 'upgrader_pre_install', array( $this, 'deactivate_plugin_before_upgrade' ) );
wp-admin/includes/class-plugin-upgrader.php 239
remove_filter( 'upgrader_pre_install', array( $this, 'active_before' ) );
wp-admin/includes/class-theme-upgrader.php 316
add_filter( 'upgrader_pre_install', array( $this, 'current_before' ), 10, 2 );
wp-admin/includes/class-theme-upgrader.php 339
remove_filter( 'upgrader_pre_install', array( $this, 'current_before' ) );
wp-admin/includes/class-theme-upgrader.php 388
add_filter( 'upgrader_pre_install', array( $this, 'current_before' ), 10, 2 );
wp-admin/includes/class-theme-upgrader.php 481
remove_filter( 'upgrader_pre_install', array( $this, 'current_before' ) );