php 导出 Excel 报错 exception 'PHPExcel_Calculation_Exception' with message

exception 'PHPExcel_Calculation_Exception' with message '粉丝数据!C2679 -> Formula Error: Operator '=' has no operands' in D:wwwczydweixinExtendVendorPHPExcelPHPExcelCell.php:300 Stack trace: #0 D:wwwczydweixinExtendVendorPHPExcelPHPExcelWriterExcel5Worksheet.php(460): PHPExcel_Cell->getCalculatedValue() #1 D:wwwczydweixinExtendVendorPHPExcelPHPExcelWriterExcel5.php(187): PHPExcel_Writer_Excel5_Worksheet->close() #2 D:wwwczydweixinPigCmsLibActionUserWechat_groupAction.class.php(294): PHPExcel_Writer_Excel5->save('php://output') #3 [internal function]: Wechat_groupAction->index() #4 D:wwwczydweixinLibCoreApp.class.php(183): ReflectionMethod->invoke(Object(Wechat_groupAction)) #5 D:wwwczydweixinLibCoreApp.class.php(219): App::exec() #6 D:wwwczydweixinLibCoreThink.class.php(39): App::run() #7 D:wwwczydweixinCommon untime.php(243): Think::start() #8 D:wwwczydweixinindex.php(37): require('D:wwwczydweix...') #9 {main}

关键点：Error: Operator '=' has no operands'

导致问题原因可能是导出字段中包含有  ‘=’  ，解决办法：在字段前拼上一个半单引号。

 if(strpos($lists[$i-2]['nickname'],'=') === 0){
                $lists[$i-2]['nickname'] = "'".$lists[$i-2]['nickname'];
            }