微信开发的对象问题

<?phpfunction grade($td_array){    shuffle($td_array);    foreach($td_array as $v){    echo "课程:".$v[0];    $score=$v[1];        switch($score)           {             case $score>=90 && $score<=100:             echo " 绩点:4.0  成绩:".$score." <br>";             break;             case $score>=80 && $score<90:             echo  " 绩点:3.0  成绩:".$score." <br>";          <p style="color:transparent">。本文来源gao!%daima.com搞$代*!码网1</p><cite>搞代gaodaima码</cite>   break;             case $score>=70 && $score<80:             echo " 绩点:2.0  成绩:".$score." <br>";             break;             case $score>=60 && $score<70:             echo " 绩点:1.0  成绩:".$score." <br>";             break;             case $score>=0 && $score<60:             echo " 绩点:0.0  成绩:".$score." <br>";             break;             default:             echo $score;          }	}    return ;}		$table =" Array ( [0] => 商务英语听说{td}90{td}2.0{td} [1] => 形势与政策（八）{td}70{td}0.5{td} [2] => 积极心态训练{td}89{td}1.0{td} [3] => 欧洲旅游产品设计与营销{td}76{td}2.0{td} )";		array_pop($table);		foreach ($table as $key=>$tr) {			$td = explode('{td}', $tr);			array_pop($td);			$td_array[] = $td;            }$grade=grade($td_array);print_r ($grade);

上面这一段代码是可以输出
但是放在了微信上就不能输出了！输出是空白的

private function grade($td_array){    shuffle($td_array);    foreach($td_array as $v){    echo "课程:".$v[0];    $score=$v[1];        switch($score)           {             case $score>=90 && $score<=100:             echo " 绩点:4.0  成绩:".$score." <br>";             break;             case $score>=80 && $score<90:             echo  " 绩点:3.0  成绩:".$score." <br>";             break;             case $score>=70 && $score<80:             echo " 绩点:2.0  成绩:".$score." <br>";             break;             case $score>=60 && $score<70:             echo " 绩点:1.0  成绩:".$score." <br>";             break;             case $score>=0 && $score<60:             echo " 绩点:0.0  成绩:".$score." <br>";             break;             default:             echo $score;          }	}    return ;   }            public function responseMsg()    {        $postStr = $GLOBALS["HTTP_RAW_POST_DATA"];        if (!empty($postStr)){            $postObj = simplexml_load_string($postStr, 'SimpleXMLElement', LIBXML_NOCDATA);            $fromUsername = $postObj->FromUserName;            $toUsername = $postObj->ToUserName;            $keyword = trim($postObj->Content);            $time = time();		$picTpl = "                                                                        ".$time."                                                1                                                						<Title></Title>																								                                                1                        ";		            if(!empty( $keyword ))            {               		        $table = "Array ( [0] => 商务英语听说{td}90{td}2.0{td} [1] => 形势与政策（八）{td}70{td}0.5{td} [2] => 积极心态训练{td}89{td}1.0{td} [3] => 欧洲旅游产品设计与营销{td}76{td}2.0{td} )";		        array_pop($table);		        foreach ($table as $key=>$tr) {			        $td = explode('{td}', $tr);			         array_pop($td);			        $td_array[] = $td;                }               $content=$this->grade($td_array);                               $title ="123";                                 $resultStr = sprintf ( $picTpl,$title,$content);                echo $resultStr;            }        }else{            echo "";            exit;        }    }

回复讨论(解决方案)

你自己模拟微信请求下面的逻辑，看看输出什么？
多做些记录

你自己模拟微信请求下面的逻辑，看看输出什么？
多做些记录

输出是空白的，就是在对象$content=$this->grade($td_array)这里出错了，就是想不明白哪里出错
responseMsg()里面用$content=$this->grade($td_array)就输出空白了！
不用responseMsg()这个对象是可以输出的

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