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The book-delivery activity in T Building has started again! ! ! Reply and take home a programming book! (over)

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T Building activity has started again!!! Courses worth 1,300 yuan are waiting for you (has ended)

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T Building activity has started again!!! Courses worth 1,300 yuan are waiting for you (has ended)

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PHP Chinese community is online! ! ! ! Books are given away! ! ! (Finish)

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PHP Chinese community is online! ! ! ! Books are given away! ! ! (Finish)

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PHP Chinese community is online! ! ! ! Books are given away! ! ! (Finish)

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Why is there no error reported in var_dump($meiyou)?

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if與()之間不能有空格的

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. 雙引號(hào)解析轉(zhuǎn)義字符，單引號(hào)不解析轉(zhuǎn)義字符。但，單引號(hào)能解析\' 和\

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