php man page for intl_is_failure

INTL_IS_FAILURE(3)							 1							INTL_IS_FAILURE(3)

intl_is_failure - Check whether the given error code indicates failure

SYNOPSIS
       bool intl_is_failure (int  $error_code)

DESCRIPTION
PARAMETERS
	      o $error_code
		- is a value that returned by functions: intl_get_error_code(3), collator_get_error_code(3) .

RETURN VALUES
       TRUE if it the code indicates some failure, and FALSE in case of success or a warning.

EXAMPLES
       Example #1

	      intl_is_failure(3) example

	      <?php
	      function check( $err_code )
	      {
		  var_export( intl_is_failure( $err_code ) );
		  echo "
";
	      }

	      check( U_ZERO_ERROR );
	      check( U_USING_FALLBACK_WARNING );
	      check( U_ILLEGAL_ARGUMENT_ERROR );
	      ?>

	      The above example will output something similar to:

	      false
	      false
	      true

SEE ALSO
       intl_get_error_code(3), collator_get_error_code(3), Collator-getErrorCode(3).

PHP Documentation Group 													INTL_IS_FAILURE(3)