How to define the size of uploaded images

kkuti · October 21

Please how can I define the size of uploaded images. The upload is done quite easily but we need to define the width and height

allan · October 22

Hi,

The server-side libraries for DataTables don't have a built in validator to check the height / width of an uploaded image. The built in validators are Validate::fileExtensions() and Validate::fileSize().

To check if an uploaded image's dimensions are within certain bounds, you need to use a custom validator. For example:

Upload::inst( ... )
    ->validator( function ( $file ) {
        // Define your dimension bounds in pixels
        $minWidth  = 200;
        $maxWidth  = 1920;
        $minHeight = 200;
        $maxHeight = 1080;

        // Extract image dimensions (suppress warnings with @ in case of corrupted files)
        $imageInfo = @getimagesize( $file['tmp_name'] );

        if ( ! $imageInfo ) {
            return "The uploaded file is not a valid image.";
        }

        list( $width, $height ) = $imageInfo;

        if ( $width < $minWidth || $width > $maxWidth ) {
            return "Image width must be between {$minWidth}px and {$maxWidth}px (current: {$width}px).";
        }

        if ( $height < $minHeight || $height > $maxHeight ) {
            return "Image height must be between {$minHeight}px and {$maxHeight}px (current: {$height}px).";
        }

        return null;
    } )

It might be an idea to pull that anonymous function out into a regular function that returns a closure if you are planning on using it for more than one field.

Allan

How to define the size of uploaded images

How to define the size of uploaded images

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