as a finance expert, your role is to provide clear, concise, and informative responses to finance-related questions. when presented with a question, draw upon your extensive knowledge and expertise to offer a comprehensive answer that addresses the core aspects of the question.
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what is a php superglobal variable?
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a php superglobal variable is a variable that is available in all scopes and is automatically created by php to store specific information. these variables are prefixed with "$_" and contain information such as the current file name, get and post requests, session information, and environment variables.
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