Automattic / jetpack

					// First, check the image tag. Note we only check for pixel sizes now; HTML4 percentages have never been correctly

					// supported, so we stopped pretending to support them in JP 9.1.0.

					if ( preg_match( '#[\s|"|\']width=["|\']?([\d%]+)["|\']?#i', $images['img_tag'][ $index ], $width_string ) ) {

						$width = false === strpos( $width_string[1], '%' ) ? $width_string[1] : false;

					}

					if ( preg_match( '#[\s|"|\']height=["|\']?([\d%]+)["|\']?#i', $images['img_tag'][ $index ], $height_string ) ) {

						$height = false === strpos( $height_string[1], '%' ) ? $height_string[1] : false;

						$width = false === strpos( $width_string[1], '%' ) ? $width_string[1] : false;

					}

					if ( preg_match( '#[\s|"|\']height=["|\']?([\d%]+)["|\']?#i', $images['img_tag'][ $index ], $height_string ) ) {

						$height = false === strpos( $height_string[1], '%' ) ? $height_string[1] : false;

					}

					// Detect WP registered image size from HTML class.

					if ( preg_match( '#class=["|\']?[^"\']*size-([^"\'\s]+)[^"\']*["|\']?#i', $images['img_tag'][ $index ], $size ) ) {