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Upgrade: When deleting old files, if deletion fails attempt to empty the file instead.

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Props joemcgill, dd32.
Merges [42433] to the 4.9 branch.
Fixes #42963 for 4.9.

Built from https://develop.svn.wordpress.org/branches/4.9@42434


git-svn-id: http://core.svn.wordpress.org/branches/4.9@42264 1a063a9b-81f0-0310-95a4-ce76da25c4cd
This commit is contained in:
Dion Hulse 2018-01-10 06:11:39 +00:00
parent a6e75ee0b7
commit 5973b3a5e1
1 changed files with 5 additions and 1 deletions
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6
wp-admin/includes/update-core.php
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@ -1118,7 +1118,11 @@ function update_core($from, $to) {
$old_file = $to . $old_file;
if ( !$wp_filesystem->exists($old_file) )
continue;
$wp_filesystem->delete($old_file, true);
// If the file isn't deleted, try writing an empty string to the file instead.
if ( ! $wp_filesystem->delete( $old_file, true ) && $wp_filesystem->is_file( $old_file ) ) {
$wp_filesystem->put_contents( $old_file, '' );
}
}
// Remove any Genericons example.html's from the filesystem