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echo<<<EOF <html> <body> <formname="MainForm"method="post"action="http://124.74.239.32/payment/main"> <INPUTtype="text"name="transName"value="{$this->getTranAbbr()}"> <INPUTtype="text"name="Plain"value="{$this->getPlain()}"> <INPUTtype="text"name="Signature"value="{$this->sign($this->getPlain())}"> <INPUTtype="submit"value="submit"/> </form> </body> </html> EOF; 注意， 1，没有用拼接 2，变量和方法的引用，都用了花括号
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