新的函数
PHP 5.4 引入一些新的函数:
PHP 核心:
- hex2bin()
- http_response_code()
- get_declared_traits()
- getimagesizefromstring()
- stream_set_chunk_size()
- socket_import_stream()
- trait_exists()
- header_register_callback()
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备份地址:http://www.lvesu.com/blog/php/migration54.functions.php