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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.
| Line | Code |
|---|---|
| 313 | * This filter runs before it can be used by plugins. It is designed for |
| 314 | * non-web run-times. Returning false causes the `WP_DEBUG` and related |
| 315 | * constants to not be checked and the default php values for errors |
| 316 | * will be used unless you take care to update them yourself. |
| 317 | * |
| 318 | * @since 4.6.0 |
| 319 | * |
| 320 | * @param bool $enable_debug_mode Whether to enable debug mode checks to occur. Default true. |
| 321 | */ |
| 322 | if ( ! apply_filters( 'enable_wp_debug_mode_checks', true ) ) { |
| 323 | return; |
| 324 | } |
| 325 | |
| 326 | if ( WP_DEBUG ) { |
| 327 | error_reporting( E_ALL ); |
| 328 | |
| 329 | if ( WP_DEBUG_DISPLAY ) { |
| 330 | ini_set( 'display_errors', 1 ); |
| 331 | } elseif ( null !== WP_DEBUG_DISPLAY ) { |