json_last_error_msg()

(PHP 5 >= 5.5.0, PHP 7)

Returns the error string of the last json_encode()or json_decode()call

说明

json_last_error_msg(void): string

Returns the error string of the last json_encode() or json_decode() call, which did not specify JSON_THROW_ON_ERROR.

参数

此函数没有参数。

返回值

Returns the error message on success,"No error"if no error has occurred,或者在失败时返回FALSE.

参见

• json_last_error()返回最后发生的错误

Here's an updated version of the function:
<?php
  if (!function_exists('json_last_error_msg')) {
    function json_last_error_msg() {
      static $ERRORS = array(
        JSON_ERROR_NONE => 'No error',
        JSON_ERROR_DEPTH => 'Maximum stack depth exceeded',
        JSON_ERROR_STATE_MISMATCH => 'State mismatch (invalid or malformed JSON)',
        JSON_ERROR_CTRL_CHAR => 'Control character error, possibly incorrectly encoded',
        JSON_ERROR_SYNTAX => 'Syntax error',
        JSON_ERROR_UTF8 => 'Malformed UTF-8 characters, possibly incorrectly encoded'
      );
      $error = json_last_error();
      return isset($ERRORS[$error]) ? $ERRORS[$error] : 'Unknown error';
    }
  }
?>