[php-src] Issue #20627: Cannot identify some avif images with getimagesize (returns false)

Issue: https://github.com/php/php-src/issues/20627 Author: cyberbeat ### Description imagecreatefromavif works This is output of "heif-info -d" ``` MIME type: image/avif main brand: avif compatible brands: mif1, miaf Box: ftyp ----- (File Type) size: 24 (header size: 8) major brand: avif minor version: 0 compatible brands: mif1,miaf Box: meta ----- (Metadata) size: 222 (header size: 12) | Box: hdlr ----- (Handler Reference) | size: 33 (header size: 12) | pre_defined: 0 | handler_type: pict | name: | | Box: pitm ----- (Primary Item) | size: 14 (header size: 12) | item_ID: 1 | | Box: iloc ----- (Item Location) | size: 30 (header size: 12) | item ID: 1 | construction method: 0 | data_reference_index: 0 | base_offset: 0 | extents: 254,59658 | | Box: iinf ----- (Item Information) | size: 35 (header size: 12) | | Box: infe ----- (Item Info Entry) | | size: 21 (header size: 12) | | item_ID: 1 | | item_protection_index: 0 | | item_type: av01 | | item_name: | | hidden item: false | | Box: iref ----- (Item Reference) | size: 12 (header size: 12) | | Box: iprp ----- (Item Properties) | size: 86 (header size: 8) | | Box: ipco ----- (Item Property Container) | | size: 56 (header size: 8) | | | index: 1 | | | Box: ispe ----- (Image Spatial Extents) | | | size: 20 (header size: 12) | | | image width: 1080 | | | image height: 1080 | | | | | | index: 2 | | | Box: av1C ----- | | | size: 12 (header size: 8) | | | version: 1 | | | seq_profile: 1 | | | seq_level_idx_0: 31 | | | high_bitdepth: 1 | | | twelve_bit: 0 | | | monochrome: 0 | | | chroma_subsampling_x: 0 | | | chroma_subsampling_y: 0 | | | chroma_sample_position: 0 | | | initial_presentation_delay: not present | | | config OBUs: | | | | | | index: 3 | | | Box: pixi ----- (Pixel Information) | | | size: 16 (header size: 12) | | | bits_per_channel: 10,10,10 | | | | Box: ipma ----- (Item Property Association) | | size: 22 (header size: 12) | | associations for item ID: 1 | | | property index: 1 (essential: false) | | | property index: 2 (essential: true) | | | property index: 3 (essential: false) ``` and identify: ``` Format: AVIF (AV1 Image File Format) Mime type: image/avif Class: DirectClass Geometry: 1080x1080+0+0 Units: Undefined Colorspace: sRGB Type: TrueColor Base type: Undefined Endianness: Undefined Depth: 10/16-bit Channels: 3.0 Channel depth: Red: 16-bit Green: 16-bit Blue: 16-bit ``` ### PHP Version ```plain PHP 8.4.14 (cli) (built: Oct 23 2025 19:02:50) (NTS) Copyright (c) The PHP Group Zend Engine v4.4.14, Copyright (c) Zend Technologies Also tried 8.4.15 ``` ### Operating System Ubuntu 24.04 / Opensuse Tumbleweed