php man page for trait_exists

TRAIT_EXISTS(3) 							 1							   TRAIT_EXISTS(3)

trait_exists - Checks if the trait exists

SYNOPSIS
       bool trait_exists (string  $traitname, [bool  $autoload])

DESCRIPTION
PARAMETERS
	      o $traitname
		- Name of the trait to check

	      o $autoload
		- Whether to autoload if not already loaded.

RETURN VALUES
	Returns TRUE if trait exists, FALSE if not, NULL in case of an error.

PHP Documentation Group 													   TRAIT_EXISTS(3)