Placeholders (LQIP)

On add, the package records pixel dimensions and computes two low-quality image placeholders from a downscaled copy: a ThumbHash and a Blurhash. Both encoders are pure-PHP ports validated against the reference vectors — no third-party dependency:

$media->width;                 // e.g. 1920 (null for non-images)
$media->height;                // e.g. 1080

$media->placeholder();         // ['thumbhash' => '1QcSHQ…', 'blurhash' => 'LPDI|4…']
$media->thumbhash();           // string|null
$media->blurhash();            // string|null
$media->placeholderDataUri();  // 'data:image/png;base64,…' — a tiny blur-up image

placeholderDataUri() decodes a placeholder server-side (ThumbHash preferred, Blurhash fallback) into a tiny PNG data: URI you can use as a blur-up background while the full image loads. Each placeholder type is independently toggleable in config.