jpeg_quality │ filter-hook │ WP 2.5.0

Filters the JPEG compression quality for backward-compatibility.

Applies only during initial editor instantiation, or when set_quality() is run manually without the $quality argument.

The WP_Image_Editor::set_quality() method has priority over the filter.

The filter is evaluated under two contexts: 'image_resize', and 'edit_image', (when a JPEG image is saved to file).

Usage

add_filter( 'jpeg_quality', 'wp_kama_jpeg_quality_filter', 10, 2 );

/**
 * Function for `jpeg_quality` filter-hook.
 * 
 * @param int    $quality Quality level between 0 (low) and 100 (high) of the JPEG.
 * @param string $context Context of the filter.
 *
 * @return int
 */
function wp_kama_jpeg_quality_filter( $quality, $context ){

	// filter...
	return $quality;
}

$quality(int)

Quality level between 0 (low) and 100 (high) of the JPEG.

$context(string)

Context of the filter.

Changelog

Where the hook is called

$quality = apply_filters( 'jpeg_quality', $quality, 'image_resize' );

return imagejpeg( $image, $filename, apply_filters( 'jpeg_quality', 90, 'edit_image' ) );

Where the hook is used in WordPress