How to include variables in double-quoted strings in php?


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What is the method to execute a php script from the command line?

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How to get ip address of a server in php?

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What is filter_var?

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Is null check in php?

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What are sql injections, how do you prevent them and what are the best practices?

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What is the use of $_server["php_self"] variable?

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What language is php based on?

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Is php a framework?

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What is the purpose of the php empty function?

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How to get the ip address of the client?

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Tell me how can we check the value of a given variable is alphanumeric?

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