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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 |
|---|---|
| 3033 | * @uses apply_filters() Calls 'doing_it_wrong_trigger_error' and expects boolean value of true to do |
| 3034 | * trigger or false to not trigger error. |
| 3035 | * |
| 3036 | * @param string $function The function that was called. |
| 3037 | * @param string $message A message explaining what has been done incorrectly. |
| 3038 | * @param string $version The version of WordPress where the message was added. |
| 3039 | */ |
| 3040 | function _doing_it_wrong( $function, $message, $version ) { |
| 3041 | |
| 3042 | do_action( 'doing_it_wrong_run', $function, $message, $version ); |
| 3043 | |
| 3044 | // Allow plugin to filter the output error trigger |
| 3045 | if ( WP_DEBUG && apply_filters( 'doing_it_wrong_trigger_error', true ) ) { |
| 3046 | if ( function_exists( '__' ) ) { |
| 3047 | $version = is_null( $version ) ? '' : sprintf( __( '(This message was added in version %s.)' ), $version ); |
| 3048 | $message .= ' ' . __( 'Please see <a href="http://codex.wordpress.org/Debugging_in_WordPress">Debugging in WordPress</a> for more information.' ); |
| 3049 | trigger_error( sprintf( __( '%1$s was called <strong>incorrectly</strong>. %2$s %3$s' ), $function, $message, $version ) ); |
| 3050 | } else { |
| 3051 | $version = is_null( $version ) ? '' : sprintf( '(This message was added in version %s.)', $version ); |