Web Reference: Mar 16, 2011 · It may be down for maintenance or configured incorrectly. There is no specific file that triggers this. But I saw that usually small programs that consists of 4-5 php files, runs fine, but softwares with a lot of files (like PrestaShop) don't. I checked the logs and this is what I found. Jul 23, 2025 · Troubleshoot PHP 'Failed to Open Stream' errors with this comprehensive guide. Learn to check paths, permissions, include paths, and server configurations. Every time I edit a file (in this case a PHP file) and upload it via FTP to my VPS, via the user 'xtreme', the file, when accessed, outputs the following: Warning: Unknown: failed to open stream:
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