/// <summary>
/// Verifies that the contents of a variable can be called as a function.
/// </summary>
/// <param name="ctx">Current runtime context.</param>
/// <param name="variable">The variable.</param>
/// <param name="syntaxOnly">If <B>true</B>, it is only checked that has <pararef name="variable"/>
/// a valid structure to be used as a callback. if <B>false</B>, the existence of the function (or
/// method) is also verified.</param>
/// <param name="callableName">Receives the name of the function or method (for example
/// <c>SomeClass::SomeMethod</c>).</param>
/// <returns><B>true</B> if <paramref name="variable"/> denotes a function, <B>false</B>
/// otherwise.</returns>
public static bool is_callable(Context ctx /*, caller*/, PhpValue variable, bool syntaxOnly, out string callableName)
{
var callback = variable.AsCallable();
if (PhpVariable.IsValidCallback(callback))
{
callableName = callback.ToString();
return true;
}
callableName = variable.ToString(ctx);
return false;
}
/// <summary>
/// Verifies that the contents of a variable can be called as a function.
/// </summary>
/// <param name="variable">The variable.</param>
/// <param name="syntaxOnly">If <B>true</B>, it is only checked that has <pararef name="variable"/>
/// a valid structure to be used as a callback. if <B>false</B>, the existence of the function (or
/// method) is also verified.</param>
/// <returns><B>true</B> if <paramref name="variable"/> denotes a function, <B>false</B>
/// otherwise.</returns>
public static bool is_callable(PhpValue variable, bool syntaxOnly = false)
{
return PhpVariable.IsValidCallback(variable.AsCallable()); // TODO: check syntaxOnly || can be bound
}
/// <summary> /// Gets value as a callable object that can be invoked dynamically. /// </summary> public static IPhpCallable AsCallable(PhpValue value) => value.AsCallable();
/// <summary> /// Gets value as a callable object that can be invoked dynamically. /// </summary> public static IPhpCallable AsCallable(PhpValue value, RuntimeTypeHandle callerCtx) => value.AsCallable(callerCtx);
/// <summary> /// Gets value as a callable object that can be invoked dynamically. /// </summary> public static IPhpCallable AsCallable(PhpValue value) => value.AsCallable();
/// <summary> /// Gets value as a callable object that can be invoked dynamically. /// </summary> public static IPhpCallable AsCallable(PhpValue value, RuntimeTypeHandle callerCtx, object callerObj) => value.AsCallable(callerCtx, callerObj);