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This article explains several built‑in PHP functions—mime_content_type, finfo_file, pathinfo, and getimagesize—used to detect a file's MIME type or extension, showing their syntax, usage examples, and important considerations such as required extensions and potential limitations.
This article explains several PHP functions—mime_content_type, finfo_file, pathinfo, and getimagesize—used to detect a file's type or MIME information, showing their syntax, examples, and important considerations such as required extensions and version compatibility.
The article explains PHP's getimagesize() function, which determines the dimensions, type, and MIME information of various image formats, describes its return values, and provides a complete code example demonstrating how to retrieve image size and output the image with appropriate headers.