PHP mysqli_fetch_fields() 函数 PHP MySQLi 参考手册 返回结果集中代表字段(列)的对象的数组,然后输出每个字段名称、表格和最大长度: 定义和用法 mysqli_fetch_fields() 函数返回结果集中代表字段(列)的对象的数组。 语法 mysqli_fetch_fields(result);
}$sql="SELECT name,url FROM websites ORDER BY alexa";if($result=mysqli_query($con,$sql)) {//获取所有字段的信息$fieldinfo=mysqli_fetch_fields($result);foreach($fieldinfoas$val) {printf("字段名: %s",$val->name);echo"";printf("数据表: %s",$val->table);echo"";printf("最大长度:...
MYSQL_FIELD * mysql_fetch_fields(MYSQL_RES * res); res- a result set identifier returned bymysql_store_result()ormysql_use_result(). Description This function serves an identical purpose to themysql_fetch_field()function with the single difference that instead of returning one field at a tim...
这里的fieldnr是一个整数，它代表字段在结果集中从0开始的索引，其范围应该在0到mysql_num_fields(result)减1之间，其中mysql_num_fields(result)表示结果集中列的数量。通过调用mysql_fetch_field_direct，你可以针对任意列获取其字段类型、名称、长度、是否可为空等属性信息。这个函数执行时，如果指定的...
5.4.19 mysql_fetch_fields() MYSQL_FIELD*mysql_fetch_fields(MYSQL_RES*result) Description Returns an array of allMYSQL_FIELDstructures for a result set. Each structure provides the field definition for one column of the result set. Return Values ...
PHP mysqli_fetch_fields() 函数 返回结果集中代表字段(列)的对象的数组,然后输出每个字段名称、表格和最大长度: <?php // 假定数据库用户名:root,密码:123456,数据库:RUNOOB $con=mysqli_connect("localhost","root","123456","RUNOOB"); if (mysqli_connect_errno($con))...
11.15 _mysql_connector.MySQL.fetch_fields() Method Syntax: field_info=ccnx.fetch_fields() Fetches column information for the active result set. Returns a list of tuples, one tuple per column Raises aMySQLInterfaceErrorexception for any MySQL error returned by the MySQL server. ...
// Get field information for all fields while($fieldinfo =$result -> fetch_field()) { printf("Name: %s\n", $fieldinfo -> name); printf("Table: %s\n", $fieldinfo -> table); printf("Max. Len: %d\n", $fieldinfo -> max_length); ...
} /* get column metadata */ $i=0; while ($i<mysql_num_fields($result)) { echo"Information for column$i:\n"; $meta=mysql_fetch_field($result,$i); if (!$meta) { echo"No information available\n"; } echo" blob:$meta->blob max_...
MYSQL_FIELD * mysql_fetch_field_direct(MYSQL_RES * res, unsigned int fieldnr); res - a result set identifier returned by mysql_store_result() or mysql_use_result(). fieldnr - the field number. This value must be within the range from 0 to number of fields - 1 Description Return...