清单2展示了一个简短的php指令集，可以提取需要的数据。
Listing 2 shows a short, simplified set of instructions in PHP to extract the data required.
专用处理器，如DSP等，因主要支持特定应用，其指令集往往只支持有限的数据类型。
Special purpose processors, such as DSPs, can only support limited data types in their instruction sets because they are suitable to specific applications.
为了用于实现多媒体数据处理，针对音视频的DSP处理器结构经过了特别优化设计，且提供了丰富的多媒体处理指令集。
The hardware structure of DSP processor core is especially designed for multimedia data processing, and plentiful multimedia data processing instructions are available.
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