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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 |
|---|---|
| 2165 | * @param string $file The file that was included |
| 2166 | * @param string $version The version of WordPress that depreceated the function |
| 2167 | * @param string $replacement Optional. The function that should have been called |
| 2168 | */ |
| 2169 | function _deprecated_file($file, $version, $replacement=null) { |
| 2170 | |
| 2171 | do_action('deprecated_file_included', $file, $replacement); |
| 2172 | |
| 2173 | // Allow plugin to filter the output error trigger |
| 2174 | if( defined('WP_DEBUG') && ( true === WP_DEBUG ) && apply_filters( 'deprecated_file_trigger_error', true )) { |
| 2175 | if( !is_null($replacement) ) |
| 2176 | trigger_error( sprintf( __('%1$s is <strong>deprecated</strong> since version %2$s! Use %3$s instead.'), $file, $version, $replacement ) ); |
| 2177 | else |
| 2178 | trigger_error( sprintf( __('%1$s is <strong>deprecated</strong> since version %2$s with no alternative available.'), $file, $version ) ); |
| 2179 | } |
| 2180 | } |
| 2181 | |
| 2182 | /** |
| 2183 | * Is the server running earlier than 1.5.0 version of lighttpd |