exif_imagetype(PHP 4 >= 4.3.0, PHP 5) exif_imagetype — Determine the type of an image Описание
int exif_imagetype
( string $filename
)
exif_imagetype() reads the first bytes of an image and checks its signature. exif_imagetype() can be used to avoid calls to other exif functions with unsupported file types or in conjunction with $_SERVER['HTTP_ACCEPT'] to check whether or not the viewer is able to see a specific image in the browser. Список параметров
Возвращаемые значенияWhen a correct signature is found, the appropriate constant value will be returned otherwise the return value is FALSE. The return value is the same value that getimagesize() returns in index 2 but exif_imagetype() is much faster. Список изменений
Предопределенные константыThe following constants are defined, and represent possible exif_imagetype() return values:
Примеры
Пример #1 exif_imagetype() example
<?phpСмотрите также
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