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HTML
Picture Element — Art Direction
`<picture>` lets you serve DIFFERENT images at different breakpoints — not just different sizes of the same crop. Perfect for a wide desktop banner that becomes a square mobile poster.
@admin
HTML
Responsive Image — srcset + sizes
Let the browser pick the right image for the viewport. `srcset` lists candidates by intrinsic width; `sizes` tells the browser how big the image will render. Cuts mobile data dramatically.
PHP
Resize Image to Max Dimension
Shrink an uploaded image so its longest side is no more than $maxDim pixels, preserving aspect ratio. Re-encodes to JPEG at the given quality. Uses the GD extension.