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Explainer
The PHP flaw to patch now: PHP2Shell in 90 seconds
Two critical PHP flaws, nicknamed PHP2Shell, let a stranger run their own code on a server with no password. The PHP team shipped fixes on 21 October 2026. Here is what is affected, what attackers have done, and the three steps to take.
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3:12NewThe Complete Claude Curriculum in 3 minutes
Most people use Claude like a search box. The people shipping real work have a map. The trust ladder, agents and the loop inside them, MCP, the permissions that stop real incidents, and what it all costs.
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