What are some best practices for optimizing PHP code to prevent unnecessary image loading and flashing on webpage transitions?

To prevent unnecessary image loading and flashing on webpage transitions, a best practice is to preload images using PHP to ensure they are already loaded when needed. This can be achieved by dynamically generating HTML image tags with the image URLs as sources in the head section of the webpage. 

<?php
$images = array('image1.jpg', 'image2.jpg', 'image3.jpg');

foreach ($images as $image) {
    echo '<link rel="preload" as="image" href="' . $image . '">' . PHP_EOL;
}
?>

Keywords

PHP image loading webpage transitions optimization flashing

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