html - How to configure npm pug-php-filter with gulp? -

i cannot figure out how configure pug-php-filter(https://www.npmjs.com/package/pug-php-filter) gulp can use php in pug file.
plz me this.

var rename = require('gulp-rename'); var pug = require('gulp-pug'),     pugphpfilter = require('pug-php-filter');  gulp.task('pug', function() {   return gulp.src('./_pugfiles/**/*.pug')    .pipe( pug({        pretty: "\t",        filters: {         php: pugphpfilter     } }) )    .pipe(rename(function (path) {       path.extname = ".php"     }))   .pipe(gulp.dest('./site'));  });