PHP export data as excel table

Go straight to the code ：

<?php 

    /**
        *  Export data as excel form 
        *@param $data     A two-dimensional array , The structure is like an array from a database 
        *@param $title   excel The first line of the title , An array , If it is empty, there is no title 
        *@param $filename  Download file name 
    */
    function exportExcel($data=array(),$title=array(),$filename='test'){
        header("Content-type:application/octet-stream");
        header("Accept-Ranges:bytes");
        header("Content-type:application/vnd.ms-excel");  
        header("Content-Disposition:attachment;filename=".$filename.".xlsx");
        header("Pragma: no-cache");
        header("Expires: 0");
        // export xls  Start 
        if (!empty($title)){
            foreach ($title as $k => $v) {
                $title[$k]=iconv("UTF-8", "GB2312", $v);
            }
            $title= implode("\t", $title);
            echo "$title\n";
        }
        if (!empty($data)){
            foreach($data as $key=>$val){
                foreach ($val as $ck => $cv) {
                    $data[$key][$ck]=iconv("UTF-8", "GB2312", $cv);
                }
                $data[$key]=implode("\t", $data[$key]);
                
            }
            echo implode("\n",$data);
        }
    }


    $data = [
        [' Zhang San ', 28, ' male '],
        [' Li Si ', 18, ' Woman ']
    ];

    $data = [
        [
            'name' => ' Zhang San ', 
            'age' => 28, 
            'sex' => ' male '
        ],
        [
            'name' => ' Li Si ', 
            'age' => 24, 
            'sex' => ' Woman '
        ],
    ];

    $title = [' full name ', ' Gender ', ' Age '];
    
    exportExcel($data, $title);

The exported data is as follows ：