Answer
php.ini configures PHP settings such as memory limits, error reporting, sessions, and upload sizes.
Quick Answer
php.ini is the main config file for PHP. Controls memory limit, upload size, error reporting, session settings, timezone, and extension loading. Located at /etc/php/php.ini (Linux). PHP reads it on startup. Changes need a server restart. Use phpinfo() to see what values are active. Each project can override with per-directory .user.ini files.
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SugharaIQ Editorial Team
Verified Answer
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Source: SugharaIQ