code: public function getDefinition()
      {
          return new FixerDefinition(
              'Remove Zero-width space (ZWSP), Non-breaking space (NBSP) and other invisible unicode symbols.',
              [
                  new CodeSample(
                      '<?php echo "'.pack('H*', 'e2808b').'Hello'.pack('H*', 'e28087').'World'.pack('H*', 'c2a0')."!\";\n"
                  ),
                  new VersionSpecificCodeSample(
                      '<?php echo "'.pack('H*', 'e2808b').'Hello'.pack('H*', 'e28087').'World'.pack('H*', 'c2a0')."!\";\n",
                      new VersionSpecification(70000),
                      ['use_escape_sequences_in_strings' => true]
                  ),
              ],
              null,
              'Risky when strings contain intended invisible characters.'
          );
      }
docs: {@inheritdoc}