mysql奇怪的报错

今天我写php对某个表进行插入，

image.png

之前gff_line我给它取名为 index，导致我一直产生mysql语法报错

$EXM9U%ZFZHR4XUI}}XFX4Y.png

他说明在index附近有报错，我后来才意识到index可能是mysql的标识符，在php5.5.12中不能采用index作为字段名称。
因此我把index改成另外一个名字，我的文件就能跑通了。

顺便附上我的code

<?php
function read_all_dir ( $dir )//read all the file from dir
{
    $result = array();
    $handle = opendir($dir);
    if ( $handle )
    {
        while ( ( $file = readdir ( $handle ) ) !== false )
        {
            if ( $file != '.' && $file != '..')
            {
                $cur_path = $dir . DIRECTORY_SEPARATOR . $file;
                if ( is_dir ( $cur_path ) )
                {
                    $result['dir'][$cur_path] = read_all_dir ( $cur_path );
                }
                else
                {
                    $result['file'][] = $cur_path;
                }
            }
        }
        closedir($handle);
    }
    return $result;
}
error_reporting(E_ALL &~E_NOTICE &~E_DEPRECATED);//report the mysql error
$connect = mysqli_connect('localhost','root','','dbcan3') or die('Unale to connect');
$hostdir = "D:/project/gff/cgc_table";//read all the cgc data, the data file is named by genome
$dir = read_all_dir($hostdir);
//print_r($dir);
$i = 0;
foreach ($dir['file'] as $key => $value) {
    $fp = fopen($value,"r");
    $str ="";
    while(!feof($fp)){
        $i = $i + 1;
        $str = fgets($fp);
        $str = trim($str);
        if(strcmp($str[0],"+")!=0){//extract the non "+++" line
            $arr = explode("\t",$str);
            $sql_insert = "INSERT INTO cgc_new_table(gff_line,
              type,prev_dis,for_dis,cgc_no,refseq_id,start,end,pro,strand,product,signature,gen,taxid,sp_name)
    VALUES ('"
    .mysqli_escape_string($connect,$arr[0])."','"
    .mysqli_escape_string($connect,$arr[1])."','"
    .mysqli_escape_string($connect,$arr[2])."','"
    .mysqli_escape_string($connect,$arr[3])."','"
    .mysqli_escape_string($connect,$arr[4])."','"
    .mysqli_escape_string($connect,$arr[5])."','"
    .mysqli_escape_string($connect,$arr[6])."','"
    .mysqli_escape_string($connect,$arr[7])."','"
    .mysqli_escape_string($connect,$arr[8])."','"
    .mysqli_escape_string($connect,$arr[9])."','"
    .mysqli_escape_string($connect,$arr[10])."','"
    .mysqli_escape_string($connect,$arr[11])."','"
    .mysqli_escape_string($connect,$arr[12])."','"
    .mysqli_escape_string($connect,$arr[13])."','"
    .mysqli_escape_string($connect,$arr[14])."');";
            $result_in = mysqli_query($connect, $sql_insert)  or die ('Error querying database.'. mysqli_error($connect));
            if($i % 10000 == 0)
              print $i."\n";

       }
     }
}

//$result = mysqli_query($connect, $sql)  or die ('Error querying database.'. mysqli_error($connect));


?>