Object of type %s is not callable

Description

There was an attempt to call a function whose name was provided in a variable, but that value could not be related to a callable code.

  • null : not a callable

  • true, false : booleans are not callable

  • int : integers are not callable

  • real : real are not callable

  • array : arrays are callable when they have two elements, with keys 0 and 1. First one is a class or an object of that class, the second is a string with a visible method name on that class. Otherwise, they are not valid callables.

  • string : strings are callable when they represent a function, with the leading backslash, \strlen, or a method, with a class name, a double colon ::, and a visible method name. Otherwise, they are not valid callables.

  • object : object are callable when their class has a __invoke method. This might be through a parent, like Closure. Otherwise, objects are not callable, although their method are.

All of these may be checked with a call to is_callable() on the variable, before using it.

Example

<?php

$method = new stdClass;
$method();

?>

Literal Examples

  • Object of type stdClass is not callable

  • Object of type X is not callable

Solutions

  • Check the variable with is_callable(), before using it with the call syntax.

  • Use one of the available format.