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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 |
---|---|
5135 | * |
5136 | * @since 3.1.0 |
5137 | * @since 5.1.0 Added the $function, $message and $version parameters. |
5138 | * |
5139 | * @param bool $trigger Whether to trigger the error for _doing_it_wrong() calls. Default true. |
5140 | * @param string $function The function that was called. |
5141 | * @param string $message A message explaining what has been done incorrectly. |
5142 | * @param string $version The version of WordPress where the message was added. |
5143 | */ |
5144 | if ( WP_DEBUG && apply_filters( 'doing_it_wrong_trigger_error', true, $function, $message, $version ) ) { |
5145 | if ( function_exists( '__' ) ) { |
5146 | if ( is_null( $version ) ) { |
5147 | $version = ''; |
5148 | } else { |
5149 | /* translators: %s: Version number. */ |
5150 | $version = sprintf( __( '(This message was added in version %s.)' ), $version ); |
5151 | } |
5152 |
|
5153 | $message .= ' ' . sprintf( |