我不是专家，但这对我有用。

$sql = "desc MyTable";
$result = @mysql_query($sql);
while($row = @mysql_fetch_array($result)){
    echo $row[0]."<br>"; // returns the first column of array. in this case Field

      // the below code will return a full array-> Field,Type,Null,Key,Default,Extra    
      // for ($c=0;$c<sizeof($row);$c++){echo @$row[$c]."<br>";}    

}

当你想检查你的所有表结构与一些文件，然后使用这段代码。在这个查询中，我选择column_name,column_type和table_name以获取更多详细信息。我使用按列的顺序，所以我可以很容易地看到它。

SELECT `COLUMN_NAME`,COLUMN_TYPE,TABLE_NAME 
FROM `INFORMATION_SCHEMA`.`COLUMNS` 
WHERE `TABLE_SCHEMA`='yourdatabasename' order by DATA_TYPE;

如果你只想检查双类型文件，那么你可以很容易地做到这一点

SELECT `COLUMN_NAME`,COLUMN_TYPE,TABLE_NAME,DATA_TYPE 
FROM `INFORMATION_SCHEMA`.`COLUMNS` 
WHERE `TABLE_SCHEMA`='yourdatabasename' AND DATA_TYPE like '%bigint%'  order by DATA_TYPE;

如果你想检查哪个字段允许空类型等，那么你可以使用这个

SELECT `COLUMN_NAME`,COLUMN_TYPE,TABLE_NAME,IS_NULLABLE,DATA_TYPE 
FROM `INFORMATION_SCHEMA`.`COLUMNS` 
WHERE `TABLE_SCHEMA`='yourdatabasename' and DATA_TYPE like '%bigint%' and IS_NULLABLE ='NO' order by COLUMN_TYPE;

你想检查更多，然后认为链接也帮助你。

https://dev.mysql.com/doc/refman/5.7/en/columns-table.html

function get_col_names(){  
    $sql = "SHOW COLUMNS FROM tableName";  
    $result = mysql_query($sql);     
    while($record = mysql_fetch_array($result)){  
     $fields[] = $record['0'];  
    }
    foreach ($fields as $value){  
      echo 'column name is : '.$value.'-';  
}  
 }  

return get_col_names();

我在SQL Server中尝试过这个查询，这对我有用:

SELECT name FROM sys.columns WHERE OBJECT_ID = OBJECT_ID('table_name')

在WORDPRESS:

global $wpdb;   $table_name=$wpdb->prefix.'posts';
foreach ( $wpdb->get_col( "DESC " . $table_name, 0 ) as $column_name ) {
  var_dump( $column_name );
}

使用mysql_fetch_field()查看所有列数据。参见手册。

$query = 'select * from myfield';
$result = mysql_query($query);
$i = 0;
while ($i < mysql_num_fields($result))
{
   $fld = mysql_fetch_field($result, $i);
   $myarray[]=$fld->name;
   $i = $i + 1;
}

“警告 这个扩展在PHP 5.5.0已经弃用了，将来也会被移除。”