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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 | } |