PHP Variable Handling Functions


On this page, functions are enlisted to handle the variables in PHP. No installation is required as they are part of the core language.

boolval()Returns the boolean value of a variable
debug_zval_dump()Dump string representation of an internal zend value to output
doubleval()Alias of floatval()
empty()Check if variable is empty
floatval()Returns the float value of a variable
get_defined_vars()Returns all defined variables, as an array
get_resource_type()Returns the type of a resource
gettype()Returns the type of a variable
intval()Returns the integer value of a variable
is_array()Checks whether a variable is an array
is_bool()Checks if variable is a boolean
is_callable()Check if the contents of a variable can be called a function
is_countable()Checks if contents of a variable is a countable value
is_double()Alias of is_float()
is_float()Checks if variable is of type float
is_int()Checks if variable is of type integer
is_integer()Alias of is_int()
is_iterable()Check if contents of a variable is an iterable value
is_long()Alias of is_int()
is_null()Checks if variable is NULL
is_numeric()Check if variable is a number or a numeric string
is_object()Checks if variable is an object
is_real()Alias of is_float()
is_resource()Checks if variable is a resource
is_scalar()Checks if variable is a scalar
is_string()Check if variable is of type string
isset()Checks if variable is set (declared and not NULL)
print_r()Print the information about a variable in a human-readable way
serialize()Convert storable representation of a value
settype()Convert variable to a specific type
strval()Returns the string value of a variable
unserialize()Convert serialized data back into actual data
unset()Unset a variable
var_dump()Dump information about one or more variables
var_export()Returns structured information (valid PHP code) about a variable
Variable handling functions in PHP

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