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When configuring composer.json for PHP projects, picking the right version constraint operator is critical for stability and automation. This guide explains caret, tilde, exact, wildcard, and range operators, compares their semantics, and shows how to validate changes with Composer commands.
Could not find a matching version for package: unresolved suggestion behavior During a Composer run, the resolver emits the error “Could not find a matching version for package” when the declared constraints in composer.json cannot be satisfied by any available release. The failure causes Composer to abort the install, leaving the developer to manually inspe
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