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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 |
---|---|
4845 | /** |
4846 | * Filters whether to trigger an error for deprecated functions. |
4847 | * |
4848 | * `WP_DEBUG` must be true in addition to the filter evaluating to true. |
4849 | * |
4850 | * @since 4.3.0 |
4851 | * |
4852 | * @param bool $trigger Whether to trigger the error for deprecated functions. Default true. |
4853 | */ |
4854 | if ( WP_DEBUG && apply_filters( 'deprecated_constructor_trigger_error', true ) ) { |
4855 | if ( function_exists( '__' ) ) { |
4856 | if ( $parent_class ) { |
4857 | trigger_error( |
4858 | sprintf( |
4859 | /* translators: 1: PHP class name, 2: PHP parent class name, 3: Version number, 4: __construct() method. */ |
4860 | __( 'The called constructor method for %1$s in %2$s is <strong>deprecated</strong> since version %3$s! Use %4$s instead.' ), |
4861 | $class, |
4862 | $parent_class, |
4863 | $version, |