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Upgrade/Install: Check if the disk_free_space() function exists before calling it.

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In PHP 8+, `@` no longer suppresses fatal errors:
> The `@` operator will no longer silence fatal errors (`E_ERROR`, `E_CORE_ERROR`, `E_COMPILE_ERROR`, `E_USER_ERROR`, `E_RECOVERABLE_ERROR`, `E_PARSE`).

Reference: [https://www.php.net/manual/en/migration80.incompatible.php PHP 8: Backward Incompatible Changes].

`disk_free_space()` may be disabled by hosts, which will throw a fatal error on a call to undefined function.

This change prevents the fatal error, and falls back to `false` when `disk_free_space()` is unavailable.

Follow-up to [25540], [25774], [25776], [25831], [25869].

Props costdev, jrf, swb1192, SergeyBiryukov.
Fixes #54826. See #54730.

git-svn-id: https://develop.svn.wordpress.org/trunk@52585 602fd350-edb4-49c9-b593-d223f7449a82
This commit is contained in:
Sergey Biryukov
2022-01-17 11:39:35 +00:00
parent a0b1f27de6
commit e57bd841f0
2 changed files with 3 additions and 3 deletions
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src/wp-admin/includes/file.php
+2 -2
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@@ -1661,7 +1661,7 @@ function _unzip_file_ziparchive( $file, $to, $needed_dirs = array() ) {
* Require we have enough space to unzip the file and copy its contents, with a 10% buffer.
*/
if ( wp_doing_cron() ) {
$available_space = @disk_free_space( WP_CONTENT_DIR );
$available_space = function_exists( 'disk_free_space' ) ? @disk_free_space( WP_CONTENT_DIR ) : false;
if ( $available_space && ( $uncompressed_size * 2.1 ) > $available_space ) {
return new WP_Error(
@@ -1802,7 +1802,7 @@ function _unzip_file_pclzip( $file, $to, $needed_dirs = array() ) {
* Require we have enough space to unzip the file and copy its contents, with a 10% buffer.
*/
if ( wp_doing_cron() ) {
$available_space = @disk_free_space( WP_CONTENT_DIR );
$available_space = function_exists( 'disk_free_space' ) ? @disk_free_space( WP_CONTENT_DIR ) : false;
if ( $available_space && ( $uncompressed_size * 2.1 ) > $available_space ) {
return new WP_Error(