I purchased a commercial software which needed Zend optimizer since it was encoded one. I uploaded all my scripts to my linux server and suddenly i got this error when accessing the site.

Fatal error: Unable to read 25447 bytes in index.php

I did have Zend optimizer installed in our cpanel server and didnt know how to fix this problem. Sooner we found the culprit was FTP software.

Fix:

Since the scripts are encoded, you have to upload the php files in BINARY mode and not in ASCII mode. The ftp software filezilla doesnt know it so i have to manually set to binary mode before upload.

Once this is done, the problem got solved!

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