Simple answer is using $_SERVER['HTTP_USER_AGENT']. Not so simple is that we need to take into account proxy servers and other situations. In total, this information is defined in 3 $_SERVER variables.
Do you know what is the use of the function ‘imagetypes()’?
Explain me what is sql injection?
Tell me what types of loops exist in php?
Explain what is the difference between for and foreach?
Tell me how is it possible to propagate a session id?
Tell me how do you define a constant?
Tell me how to create a text file in php?
Explain me what is x+ mode in fopen() used for?
Explain what is the main difference between require() and require_once()?
Tell me how is it possible to remove escape characters from a string?
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