interface_exists
Checks if the interface has been defined
&reftitle.description;
boolinterface_exists
stringinterface_name
boolautoloadtrue
Checks if the given interface has been defined.
&reftitle.parameters;
interface_name
The interface name
autoload
Whether to call &link.autoload; or not by default.
&reftitle.returnvalues;
Returns &true; if the interface given by
interface_name has been defined, &false; otherwise.
&reftitle.examples;
<function>interface_exists</function> example
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&reftitle.seealso;
get_declared_interfaces
class_implements
class_exists