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-rw-r--r--system/libraries/Upload.php2
1 files changed, 1 insertions, 1 deletions
diff --git a/system/libraries/Upload.php b/system/libraries/Upload.php
index fc3de0329..045283f96 100644
--- a/system/libraries/Upload.php
+++ b/system/libraries/Upload.php
@@ -1054,7 +1054,7 @@ class CI_Upload {
* - a 'W' in the substr() expression bellow, would mean that we're using Windows
* - many system admins would disable the exec() function due to security concerns, hence the function_exists() check
*/
- if (substr(PHP_OS, 0, 1) !== 'W' && function_exists('exec'))
+ if (DIRECTORY_SEPARATOR !== '\\' && function_exists('exec'))
{
$output = array();
@exec('file --brief --mime-type ' . escapeshellarg($file['tmp_path']), $output, $return_code);