ceph/src/jaegertracing/thrift/lib/php/lib/StringFunc/Mbstring.php

   1 <?php
   2 /*
   3  * Licensed to the Apache Software Foundation (ASF) under one
   4  * or more contributor license agreements. See the NOTICE file
   5  * distributed with this work for additional information
   6  * regarding copyright ownership. The ASF licenses this file
   7  * to you under the Apache License, Version 2.0 (the
   8  * "License"); you may not use this file except in compliance
   9  * with the License. You may obtain a copy of the License at
  10  *
  11  *   http://www.apache.org/licenses/LICENSE-2.0
  12  *
  13  * Unless required by applicable law or agreed to in writing,
  14  * software distributed under the License is distributed on an
  15  * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
  16  * KIND, either express or implied. See the License for the
  17  * specific language governing permissions and limitations
  18  * under the License.
  19  *
  20  */
  21
  22 namespace Thrift\StringFunc;
  23
  24 class Mbstring implements TStringFunc
  25 {
  26     public function substr($str, $start, $length = null)
  27     {
  28         /**
  29          * We need to set the charset parameter, which is the second
  30          * optional parameter and the first optional parameter can't
  31          * be null or false as a "magic" value because that would
  32          * cause an empty string to be returned, so we need to
  33          * actually calculate the proper length value.
  34          */
  35         if ($length === null) {
  36             $length = $this->strlen($str) - $start;
  37         }
  38
  39         return mb_substr($str, $start, $length, '8bit');
  40     }
  41
  42     public function strlen($str)
  43     {
  44         return mb_strlen($str, '8bit');
  45     }
  46 }