mime_content_type

Function name: mime_content_type()

Applicable version: PHP 4 >= 4.3.0, PHP 5, PHP 7

Function Description: The mime_content_type() function is used to return the MIME type of the specified file.

Syntax: mime_content_type ( string $filename ) : string|false

parameter:

• $filename: The specified file path.

Return value:

• If successful, the MIME type of the file is returned.
• If it fails, false is returned.

Example:

 // 示例1：返回图片文件的MIME 类型$filename = 'path/to/image.jpg'; $mime_type = mime_content_type($filename); echo $mime_type; // 输出：image/jpeg // 示例2：返回文本文件的MIME 类型$filename = 'path/to/text.txt'; $mime_type = mime_content_type($filename); echo $mime_type; // 输出：text/plain // 示例3：返回不存在的文件的MIME 类型$filename = 'path/to/nonexistent.file'; $mime_type = mime_content_type($filename); var_dump($mime_type); // 输出：bool(false)

Notes:

• On some operating systems, the fileinfo extension needs to be installed and configured to use the function properly.
• If the MIME type of the file cannot be obtained, the function may return "application/octet-stream", indicating an unknown binary file type.