simple-php-js-gulpfile.js

// Handles js, sass, image optimisation/compilation and does very basic PHP linting and livereload
var gulp      = require('gulp'),
    minifycss = require('gulp-minify-css'),
    notify    = require('gulp-notify'),
    cache     = require('gulp-cache'),
    sass      = require('gulp-sass'),
    uglify    = require('gulp-uglify'),
    gutil     = require('gulp-util'),
    refresh   = require('gulp-livereload'),
    lr        = require('tiny-lr'),
    rename    = require('gulp-rename'),
    exec      = require('gulp-exec'),
    include   = require('gulp-include'),
    server    = lr();

gulp.task('sass', function(){  
  return gulp.src('sass/*.scss')
    .pipe(sass())
    .pipe(gulp.dest('public/css'))
    .pipe(rename({ suffix: '.min' }))
    .pipe(minifycss())
    .pipe(gulp.dest('public/css'))
    .pipe(refresh(server))
    .pipe(notify({ message: "Sass compiled" }))
    .on('error', gutil.log);
});

gulp.task('images', function() {
  return gulp.src('images/**/*')
    .pipe(cache(imagemin({ optimizationLevel: 3, progressive: true, interlaced: true })))
    .pipe(gulp.dest('public/images'))
    .pipe(notify({ message: 'Images optimised' }))
    .on('error', gutil.log);
});

gulp.task('js', function(){  
  return gulp.src('js/app.js')
    .pipe(include())
    .pipe(gulp.dest('public/js'))
    .pipe(uglify())
    .pipe(rename({ suffix: '.min' }))
    .pipe(gulp.dest('public/js'))
    .pipe(refresh(server))
    .pipe(notify({ message: 'Javascript compiled' }))
    .on('error', gutil.log);
})

gulp.task('php', function(){  
  return gulp.src('public/*.php')
    .pipe(exec('php -l <% file.path %>'))
    .pipe(refresh(server))
    .on('error', gutil.log);
})

gulp.task('livereload', function(){  
  return server.listen(35729, function(err){
    if(err) return console.log(err);
  });
});

gulp.task('default', ['livereload', 'sass'], function(){
  gulp.watch('sass/**', ['sass']);
  gulp.watch('js/**', ['js']);
  gulp.watch('public/*.php', ['php']);
});