PHP 8.4.2 Released!

Predefined Constants

The constants below are defined by this extension, and will only be available when the extension has either been compiled into PHP or dynamically loaded at runtime.

EXIF_USE_MBSTRING (int)
This constant has a value of 1 if the mbstring is enabled, otherwise it has a value of 0.

The exif_imagetype() lists several related built-in constants.

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