What are the potential pitfalls when converting timestamps in PHP for graph visualization using jpgraph?

When converting timestamps in PHP for graph visualization using jpgraph, one potential pitfall is not properly formatting the timestamps to be compatible with jpgraph's requirements. To avoid this issue, make sure to convert the timestamps to the correct format (usually Unix timestamp or YYYY-MM-DD HH:MM:SS) before passing them to jpgraph for graphing.

// Example code snippet for converting timestamps to Unix timestamp format for jpgraph
$timestamp = "2022-01-01 12:00:00";
$unixTimestamp = strtotime($timestamp);

// Use $unixTimestamp for graphing with jpgraph