WP_Image_Editor_GD::resize( int|null $max_w, int|null $max_h, bool $crop = false )

Source

File: wp-includes/class-wp-image-editor-gd.php

public function resize( $max_w, $max_h, $crop = false ) {
		if ( ( $this->size['width'] == $max_w ) && ( $this->size['height'] == $max_h ) ) {
			return true;
		}

		$resized = $this->_resize( $max_w, $max_h, $crop );

		if ( is_gd_image( $resized ) ) {
			imagedestroy( $this->image );
			$this->image = $resized;
			return true;

		} elseif ( is_wp_error( $resized ) ) {
			return $resized;
		}

		return new WP_Error( 'image_resize_error', __( 'Image resize failed.' ), $this->file );
	}