What considerations should be made when deciding between using SVG or canvas for displaying graphics in older browsers like IE 6 and 7?

When deciding between using SVG or canvas for displaying graphics in older browsers like IE 6 and 7, it is important to consider the level of support each technology has in those browsers. SVG is generally better supported in older browsers compared to canvas, which may require additional polyfills or workarounds to function properly. If compatibility with older browsers is a priority, SVG may be the safer choice.

// Example PHP code snippet using SVG for displaying graphics in older browsers
echo '<svg width="100" height="100">
  <circle cx="50" cy="50" r="40" stroke="black" stroke-width="3" fill="red" />
</svg>';