Answer
Composer is a dependency manager that installs, updates, and autoloads external PHP libraries.
Quick Answer
Composer is PHP's dependency manager. Define project dependencies in composer.json. composer install downloads packages to vendor/. composer update upgrades to latest versions. composer require adds new packages. It also generates the autoloader at vendor/autoload.php. PSR-4 autoloading maps namespaces to directories. Standard tool for all modern PHP projects.
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SugharaIQ Editorial Team
Verified Answer
This answer has been peer-reviewed by industry experts holding senior engineering roles to ensure technical accuracy and relevance for modern interview standards.
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Source: SugharaIQ