Function __global->function_exists

Definitions

sources_custom/phpstub.php

  • Find whether the function of the given function name has been defined.
  • Visibility: public
  • Is abstract?: No
  • Is static?: No
  • Is final?: No
  • Returns: bool

Parameters

Name Type Passed by reference? Variadic? Default Set Range Description
$function_name string No No required parameter N/A N/A The name of the function

Returns

  • Whether it is defined
  • Type: boolean
  • Set: N/A
  • Range: N/A

Preview

Code (PHP)

/**
 * Find whether the function of the given function name has been defined.
 *
 * @param  string $function_name The name of the function
 * @return boolean Whether it is defined
 */
function function_exists(string $function_name) : bool