Ticket #18453: add-backtrace-to-doing_it_wrong.diff

wp-includes/functions.php

@@ -3524 +3524 @@
 
         // Allow plugin to filter the output error trigger
         if ( WP_DEBUG && apply_filters( 'doing_it_wrong_trigger_error', true ) ) {
+                $backtrace = debug_backtrace();
+                if ( isset( $backtrace[1]['line'] ) )
+                        $source = sprintf( __( '(Source: %1$s line %2$s)' ), $backtrace[1]['file'], $backtrace[1]['line'] );
+                else if ( isset( $backtrace[1]['class'] ) )
+                        $source = sprintf( __( '(Source: %1$s%2$s%3$s)' ), $backtrace[1]['class'], $backtrace[1]['type'], $backtrace[1]['function'] );
+                else
+                        $source = __( '(Source: unknown)' );
+
                 $version = is_null( $version ) ? '' : sprintf( __( '(This message was added in version %s.)' ), $version );
-                trigger_error( sprintf( __( '%1$s was called <strong>incorrectly</strong>. %2$s %3$s' ), $function, $message, $version ) );
+                trigger_error( sprintf( __( '%1$s was called <strong>incorrectly</strong>. %2$s %3$s %4$s' ), $function, $message, $source, $version ) );
         }
 }