文件夹权限777不起作用

Question

In hosting server we set a 777 permission for folders, but we can't write the files in folders, and also we check the is_writable php code to check the permission,

if (is_writable($dir)) {
    echo $dir, ' is writable';
  } else {
    echo $dir, ' is NOT writable';
 }

but its showing "is NOT writable"

Answer 1

Check the selinux context (command: ls -Z /directory_path) of that folder.
It is suppose to be httpd_sys_content_t for apache http. If it is not set then change it to this.

chcon -h system_u:object_r:httpd_sys_content_t /directory_path

Answer 2

you can check your filename. or file path.

Bacuse your using style is correct.

Maybe a little careless. Thanks.

<?php
$file= 'try.txt'; 
if (is_writable($file)) {    
echo 'writable';
} else {    
echo 'not writable';}
?>