ucenter - php file_put_contents a strange problem

The company's project requires the use of ucenter. I installed one independently on my local computer. After installing dz, I found that the communication in ucenter failed. I checked step by step and found that the data/cache/apps.php cache in ucenter was not updated, causing the communication to fail. After deleting apps.php Communication successful.
ucenter uses the file_put_contents function to update the apps.php cache, and a strange problem is discovered:
ucenter operates application management, after adding, deleting or modifying applications, file_put_contents fails to update the cache and returns false, and then I manually put apps. If the content in php is modified or deleted, the update will be successful. Then I operated the application management again. After adding and deleting the application, the cache update file_put_contents still failed

Computer win7 php version 5.6

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The company's project requires the use of ucenter. I installed one independently on my local computer. After installing dz, I found that the communication in ucenter failed. I checked step by step and found that the data/cache/apps.php cache in ucenter was not updated, causing the communication to fail. After deleting apps.php Communication successful.
ucenter uses the file_put_contents function to update the apps.php cache, and a strange problem is discovered:
ucenter operates application management, after adding, deleting or modifying applications, file_put_contents fails to update the cache and returns false, and then I manually put apps. If the content in php is modified or deleted, the update will be successful. Then I operated the application management again. After adding and deleting the application, the cache update file_put_contents still failed

Computer win7 php version 5.6

Have you checked the permissions? Does the user/user group that provides network services have read and write permissions for the website's home directory, temporary files and cache directories?

• Make sure the path to the file is correct

• Whether the file directory has write permission set

If the file path is correct, it is most likely a permission problem. Try setting 777 permissions and you will know