PHP mysqli_fetch_field() 函数 PHP MySQLi 参考手册 返回结果集中下一字段(列),然后输出每个字段名称、表格和最大长度: 定义和用法 mysqli_fetch_field() 函数从结果集中取得下一字段(列),并作为对象返回。 语法 mysqli_fetch_field(result); 参数
MYSQL_FIELD * mysql_fetch_field(MYSQL_RES * result); result- a result set identifier returned bymysql_store_result()ormysql_use_result(). Description Returns the definition of one column of a result set as a pointer to a MYSQL_FIELD structure. Call this function repeatedly to retrieve infor...
mysqli_fetch_field_direct() 函数从结果集中取得某个单一字段(列)的 meta-data,并作为对象返回。语法mysqli_fetch_field_direct(result,fieldnr); 参数描述 result 必需。规定由 mysqli_query()、mysqli_store_result() 或 mysqli_use_result() 返回的结果集标识符。 fieldnr 必需。规定字段号。必须介于 0...
Re: mysqli_fetch_field -> length & character setPosted by: Rick James Date: October 28, 2012 10:21AM Run this (it may take a while without a WHERE clause): SELECT TABLE_SCHEMA, TABLE_NAME, COLUMN_NAME, DATA_TYPE, CHARACTER_MAXIMUM_LENGTH, CHARACTER_OCTET_LENGTH FROM COLUMNS LIMIT ...
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...
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...
问取消设置mysql_fetch_field对象值MYSQL PHPEN在 MySQL 中，我们可以为表字段设置默认值，在表中插入一...
die('Query failed: '.mysql_error()); } /* 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:$...
*field;while((field=mysql_fetch_field(result))){printf("field name %s\n",field->name);}
MYSQL_RES *res=NULL; char *query = argv[1]; res = my_query(m,query); if (res) { MYSQL_FIELD *f=NULL; printf("Fetching field: %d\n",field); f = mysql_fetch_field_direct(res,field); printf("char *name : %s\n",f->name); /* Name of column */ ...