PHP判断json格式是否正确的实现代码

php;"><?php$GLOBALS['count'] = 0;//校验data或者content的json格式是否有错误function data($value) {  if (isset($value['data'])) {    $value['data'] = json_decode($value['data'], true);  } else if (isset($value['content'])) {    $value['content'] = json_decode($value['content'], true);  } else {    die('必须要有content或者data字段');  }  $error = json_last_error();  if (!empty($error)) {    echo "<pre>";    print_r($value);    echo "</pre>";  }  return $value;}//校验静态资源是否存在；function my_filter($value) {  $needle = ['.jpg', '.jpeg', '.png', '.avi', '.mp4', '.wav', '.gif', '.mp3'];  $root = 'D:/phpStudy/WWW/levelData/';  foreach ($needle as $k => $v) {    $aa = strpos($value, $v);    if ($aa) {      $file = $root . $value;      if (!file_exists($file)) {        $GLOBALS['count']++;        return $value;      }    }  }}//获取多维数组里面某一列的下标，并重新组成一维数组function searchMultiArray(array $array, $search, $mode = 'key') {  $res = array();  foreach (new RecursiveIteratorIterator(new RecursiveArrayIterator($array)) as $key => $value) {    if ($search === ${${"mode"}}) {      if ($mode == 'key') {        $res[] = $value;      } else {        $res[] = $key;      }    }  }  return $res;}function my_filter_answer($value) {  $needle = ['，', '、', ' ', '.', ',,', '，，'];  foreach ($needle as $k => $v) {    $aa = strpos($value, $v);    if ($aa) {      return 1;    }  }}//将汉字，特殊字符原样变成json数据function ch_json_encode($data) {  $ret = ch_urlencode($data);  $ret = json_encode($ret);  return '/'' . addslashes(urldecode($ret)) . '/'';}//汉字，特殊字符变可读懂的字符串主程序function ch_urlencode($data) {  if (is_array($data) || is_object($data)) {    foreach ($data as $k => $v) {      if (is_scalar($v)) {        if (is_array($data)) {          $data[$k] = urlencode($v);        } else if (is_object($data)) {          $data->$k = urlencode($v);        }      } else if (is_array($data)) {        $data[$k] = ch_urlencode($v); // 递归调用该函数      } else if (is_object($data)) {        $data->$k = ch_urlencode($v);      }    }  }  return $data;}