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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 |
|---|---|
| 3005 | * @param string $function The function that was called |
| 3006 | * @param string $version The version of WordPress that deprecated the argument used |
| 3007 | * @param string $message Optional. A message regarding the change. |
| 3008 | */ |
| 3009 | function _deprecated_argument( $function, $version, $message = null ) { |
| 3010 | |
| 3011 | do_action( 'deprecated_argument_run', $function, $message, $version ); |
| 3012 | |
| 3013 | // Allow plugin to filter the output error trigger |
| 3014 | if ( WP_DEBUG && apply_filters( 'deprecated_argument_trigger_error', true ) ) { |
| 3015 | if ( function_exists( '__' ) ) { |
| 3016 | if ( ! is_null( $message ) ) |
| 3017 | trigger_error( sprintf( __('%1$s was called with an argument that is <strong>deprecated</strong> since version %2$s! %3$s'), $function, $version, $message ) ); |
| 3018 | else |
| 3019 | trigger_error( sprintf( __('%1$s was called with an argument that is <strong>deprecated</strong> since version %2$s with no alternative available.'), $function, $version ) ); |
| 3020 | } else { |
| 3021 | if ( ! is_null( $message ) ) |
| 3022 | trigger_error( sprintf( '%1$s was called with an argument that is <strong>deprecated</strong> since version %2$s! %3$s', $function, $version, $message ) ); |
| 3023 | else |