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PHP门类强制转换

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2016-06-13 11:39:19876browse

PHP类型强制转换？

本帖最后由 u012586110 于 2013-11-02 16:52:31 编辑 http://docs.php.net/manual/zh/language.types.type-juggling.php#language.types.typecasting

(binary) 转换和 b 前缀转换支持为 PHP 5.2.1 新增。 

将字符串文字和变量转换为二进制字符串


问题：
1.类型强制转换：(binary) ，是转换为二进制字符串。
   什么是二进制字符串？
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