src/Traits/Request_With_Content_Types.php
protected function _strpos( $haystack, $needle ) {
		return function_exists( 'mb_strpos' ) ? mb_strpos( $haystack, $needle ) : strpos( $haystack, $needle );
	}
protected function _strpos( $haystack, $needle ) {
		return function_exists( 'mb_strpos' ) ? mb_strpos( $haystack, $needle ) : strpos( $haystack, $needle );
	}
Find position of first occurrence of string in a string.

@param  string $haystack
@param  string $needle
@return bool|int