Returns the type of the PHP variable var.
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Possibles values for the returned string are:
"boolean" (since PHP 4)
"integer"
"double" (for historical reasons "double"
is returned in case of a
float, and not simply "float")
"string"
"array"
"object"
"resource" (since PHP 4)
"NULL" (since PHP 4)
"user function" (PHP 3 only, deprecated)
"unknown type"
For PHP 4, you should use
function_exists() and
method_exists() to replace the prior usage of gettype() on a function.
See also settype(),
is_array(), is_bool(),
is_float(), is_integer(),
is_null(), is_numeric(),
is_object(), is_resource(),
is_scalar(), and is_string().