php代码前端资源压缩怎么优化_php代码JSCSS图片压缩工具与加载性能优化方法

require_once 'vendor/autoload.php';
use Patchwork\JSqueeze\JSqueeze;
<p>$minifier = new JSqueeze();
$compressedJs = $minifier->squeeze(file_get_contents('script.js'));
file_put_contents('script.min.js', $compressedJs);

function combineFiles($files, $output) {
    $content = '';
    foreach ($files as $file) {
        $content .= file_get_contents($file) . "\n";
    }
    file_put_contents($output, $content);
}
combineFiles(['a.js', 'b.js'], 'all.min.js');

function compressImage($source, $destination, $quality = 80) {
    $info = getimagesize($source);
    if ($info['mime'] == 'image/jpeg') {
        $image = imagecreatefromjpeg($source);
        imagejpeg($image, $destination, $quality);
    } elseif ($info['mime'] == 'image/png') {
        $image = imagecreatefrompng($source);
        imagepng($image, $destination, (int)(($quality - 1) / 10));
    }
    imagedestroy($image);
}
compressImage('upload/photo.jpg', 'dist/photo.jpg', 75);

ob_start("ob_gzhandler");
echo $htmlContent;

<img  class="lazy" alt="">
<script>
document.querySelectorAll('.lazy').forEach(img => {
    const observer = new IntersectionObserver((entries) => {
        entries.forEach(entry => {
            if (entry.isIntersecting) {
                img.src = img.dataset.src;
                observer.unobserve(img);
            }
        });
    });
    observer.observe(img);
});
</script>

// PHP中设置缓存头
header('Cache-Control: public, max-age=31536000');
readfile('static/script.min.js');