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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 |
---|---|
4422 | do_action( 'deprecated_function_run', $function, $replacement, $version ); |
4423 |
|
4424 | /** |
4425 | * Filters whether to trigger an error for deprecated functions. |
4426 | * |
4427 | * @since 2.5.0 |
4428 | * |
4429 | * @param bool $trigger Whether to trigger the error for deprecated functions. Default true. |
4430 | */ |
4431 | if ( WP_DEBUG && apply_filters( 'deprecated_function_trigger_error', true ) ) { |
4432 | if ( function_exists( '__' ) ) { |
4433 | if ( ! is_null( $replacement ) ) { |
4434 | /* translators: 1: PHP function name, 2: version number, 3: alternative function name */ |
4435 | trigger_error( sprintf( __( '%1$s is <strong>deprecated</strong> since version %2$s! Use %3$s instead.' ), $function, $version, $replacement ) ); |
4436 | } else { |
4437 | /* translators: 1: PHP function name, 2: version number */ |
4438 | trigger_error( sprintf( __( '%1$s is <strong>deprecated</strong> since version %2$s with no alternative available.' ), $function, $version ) ); |
4439 | } |
4440 | } else { |