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php chmod fails because PHP has insufficient permissions when calling the chmod function. The solution is to manually modify the permissions of the modified files or directory permissions, and modify the user group to which the file or directory belongs. Modify statements such as "chmod - R 777 ./dirname".
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PHP Error: chmod() [function.chmod]: Permission Denied in solution
php error PHP Warning: chmod() [function.chmod]: Permission denied in...
Cause analysis:
php has insufficient permissions when calling the chmod function
Solution:
Manually modify the permissions of the modified file or directory permissions, and modify the user group of the file or directory
chmod -R 777 ./dirname chown -R www:www ./dirname
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