Question

wp_get_image_mime( string $file )

Returns the real mime type of an image file.

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description

This depends on exif_imagetype() or getimagesize() to determine real mime types.

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参数

$file

(string) (Required) Full path to the file.

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返回值

(string|false) The actual mime type or false if the type cannot be determined.

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源代码

File: wp-includes/functions.php

function wp_get_image_mime( $file ) {
	/*
	 * Use exif_imagetype() to check the mimetype if available or fall back to
	 * getimagesize() if exif isn't avaialbe. If either function throws an Exception
	 * we assume the file could not be validated.
	 */
	try {
		if ( is_callable( 'exif_imagetype' ) ) {
			$imagetype = exif_imagetype( $file );
			$mime = ( $imagetype ) ? image_type_to_mime_type( $imagetype ) : false;
		} elseif ( function_exists( 'getimagesize' ) ) {
			$imagesize = getimagesize( $file );
			$mime = ( isset( $imagesize['mime'] ) ) ? $imagesize['mime'] : false;
		} else {
			$mime = false;
		}
	} catch ( Exception $e ) {
		$mime = false;
	}

	return $mime;
}

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更新日志

Version	description
4.7.1	Introduced.

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相关函数

Used By

• wp-includes/functions.php: wp_check_filetype_and_ext()

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User Contributed Notes