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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 |
---|---|
4753 | do_action( 'deprecated_function_run', $function, $replacement, $version ); |
4754 |
|
4755 | /** |
4756 | * Filters whether to trigger an error for deprecated functions. |
4757 | * |
4758 | * @since 2.5.0 |
4759 | * |
4760 | * @param bool $trigger Whether to trigger the error for deprecated functions. Default true. |
4761 | */ |
4762 | if ( WP_DEBUG && apply_filters( 'deprecated_function_trigger_error', true ) ) { |
4763 | if ( function_exists( '__' ) ) { |
4764 | if ( $replacement ) { |
4765 | trigger_error( |
4766 | sprintf( |
4767 | /* translators: 1: PHP function name, 2: Version number, 3: Alternative function name. */ |
4768 | __( '%1$s is <strong>deprecated</strong> since version %2$s! Use %3$s instead.' ), |
4769 | $function, |
4770 | $version, |
4771 | $replacement |