[wp-trac] [WordPress Trac] #39821: Please make image extensions array filterable in wp_attachment_is()

[WordPress Trac]

#39821: Please make image extensions array filterable in wp_attachment_is()
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 Reporter:  Hinjiriyo    |      Owner:
     Type:  enhancement  |     Status:  new
 Priority:  normal       |  Milestone:  Awaiting Review
Component:  Media        |    Version:  4.7.2
 Severity:  normal       |   Keywords:
  Focuses:               |
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 The function '''wp_attachment_is()'''[1] checks the type of an attachment.
 While the checks for audio files and video files call subfunctions with
 filterable arrays of extensions [2][3] the check for image files uses a
 unfilterable - thus immutable - array.

 Please
 1) make the array of image file extensions filterable like for audios and
 videos to let more image file formats allowed in WP
 2) set that line in a subfunction just to be consistent with the functions
 for audios and videos, lets call it wp_get_image_extensions()

 [1] wp_attachment_is() in /wp-includes/post.php
 [2] wp_get_audio_extensions() in /wp-includes/media.php
 [2] wp_get_video_extensions() in /wp-includes/media.php

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Ticket URL: <https://core.trac.wordpress.org/ticket/39821>
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