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 22namespace Thrift\Factory; 23 24use Thrift\StringFunc\Core; 25use Thrift\StringFunc\Mbstring; 26use Thrift\StringFunc\TStringFunc; 27 28class TStringFuncFactory 29{ 30 private static $_instance; 31 32 /** 33 * Get the Singleton instance of TStringFunc implementation that is 34 * compatible with the current system's mbstring.func_overload settings. 35 * 36 * @return TStringFunc 37 */ 38 public static function create() 39 { 40 if (!self::$_instance) { 41 self::_setInstance(); 42 } 43 44 return self::$_instance; 45 } 46 47 private static function _setInstance() 48 { 49 /** 50 * Cannot use str* functions for byte counting because multibyte 51 * characters will be read a single bytes. 52 * 53 * See: http://php.net/manual/en/mbstring.overload.php 54 */ 55 if (ini_get('mbstring.func_overload') & 2) { 56 self::$_instance = new Mbstring(); 57 } else { 58 /** 59 * mbstring is not installed or does not have function overloading 60 * of the str* functions enabled so use PHP core str* functions for 61 * byte counting. 62 */ 63 self::$_instance = new Core(); 64 } 65 } 66} 67