Adds the gallery tab back to the tabs array if post has image attachments
media_upload_tabs
This filter is documented in wp-admin/includes/media.php
media_upload_tabs
Defines the default media upload tabs
file_is_displayable_image
Filters whether the current image is displayable in the browser.
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file_is_displayable_image
Validate that file is suitable for displaying within a web page.
wp_read_image_metadata
Filters the array of meta data read from an image’s exif data.
file_is_valid_image
Validate that file is an image.
wp_read_image_metadata_types
Filters the image types to check for exif data.
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wp_read_image_metadata
Get extended image metadata, exif or iptc as available.
wp_exif_date2ts
Convert the exif date format to a unix timestamp.
wp_exif_frac2dec
Convert a fraction string to a decimal.
request_filesystem_credentials
Filters the filesystem credentials.
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request_filesystem_credentials
Displays a form to the user to request for their FTP/SSH details in order to connect to the filesystem.
get_filesystem_method
Determines which method to use for reading, writing, modifying, or deleting files on the filesystem.
WP_Filesystem
Initializes and connects the WordPress Filesystem Abstraction classes.
