Guides tagged “php errors”
Step-by-step MdmHost guides about php errors, sorted A-Z.
5 guides
Debug a blank white page in PHP (display and log errors)
Turn a blank PHP page into a readable error: enable error logging safely, find the right log file on cPanel or a VPS, and fix the usual causes like syntax errors and missing extensions.
Fix "Allowed memory size exhausted" PHP errors
Understand the PHP fatal error 'Allowed memory size of X bytes exhausted', raise memory_limit on cPanel or a VPS, and find the code that uses too much memory.
Fix "Cannot modify header information - headers already sent"
Fix the PHP warning 'headers already sent by output started at file:line': stray whitespace, BOM characters, echo before redirects, closing tags and plugin output.
Fix "Maximum execution time exceeded" PHP errors
Fix the PHP fatal error 'Maximum execution time of 30 seconds exceeded': raise max_execution_time correctly, align web server timeouts and move long tasks out of web requests.
Fix PHP session errors: save path, permissions and lost logins
Fix session_start() errors and users being logged out: session.save_path permissions, full disks, garbage collection, cookie settings, multiple servers and Redis sessions.
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