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# PHP Available Functions PHP provides many available standard functions. The following table lists some commonly used ones: | Function | Description | | --- | --- | | (#) | Get the boolean value of a variable | | (#) | View the reference count and type information of a variable in the Zend engine | | (#) | Alias of floatval | | (#) | Check if a variable is empty | | (#) | Get the float value of a variable | | (#) | Return an array of all defined variables | | (#) | Return the type of a resource | | (#) | Get the type of a variable | | (#) | Import GET/POST/Cookie variables into the global scope | | (#) | Get the integer value of a variable | | (#) | Check if a variable is an array | | (#) | Check if a variable is a boolean | | (#) | Check if the argument is a valid callable structure | | (#) | Alias of is_float | | (#) | Check if a variable is a float | | (#) | Check if a variable is an integer | | (#) | Alias of is_int | | (#) | Check if the variable's content is an iterable value | | (#) | Alias of is_int | | (#) | Check if a variable is NULL | | (#) | Check if a variable is a number or a numeric string | | (#) | Check if a variable is an object | | (#) | Alias of is_float | | (#) | Check if a variable is a resource type | | (#) | Check if a variable is a scalar | | (