Php/docs/function.mysql-field-type
mysql_field_type
(PHP 4, PHP 5)
mysql_field_type — 取得结果集中指定字段的类型
说明
mysql_field_type
( resource $result
, int $field_offset
) : string
mysql_field_type() 和 mysql_field_name() 函数相似。参数完全相同,但返回的是字段类型而不是字段名。字段类型有“int”,“real”,“string”,“blob”以及其它,详见 » MySQL 手册。
Example #1 mysql_field_type() 例子
<?php mysql_connect("localhost", "mysql_username", "mysql_password"); mysql_select_db("mysql"); $result = mysql_query("SELECT * FROM func"); $fields = mysql_num_fields($result); $rows = mysql_num_rows($result); $table = mysql_field_table($result, 0); echo "Your '".$table."' table has ".$fields." fields and ".$rows." record(s)\n"; echo "The table has the following fields:\n"; for ($i=0; $i < $fields; $i++) { $type = mysql_field_type($result, $i); $name = mysql_field_name($result, $i); $len = mysql_field_len($result, $i); $flags = mysql_field_flags($result, $i); echo $type." ".$name." ".$len." ".$flags."\n"; } mysql_free_result($result); mysql_close();?>
以上例子将产生如下输出:
Your 'func' table has 4 fields and 1 record(s) The table has the following fields: string name 64 not_null primary_key binary int ret 1 not_null string dl 128 not_null string type 9 not_null enum
为向下兼容仍然可以使用 mysql_fieldtype(),但反对这样做。
参数
result
- resource 型的结果集。此结果集来自对 mysql_query() 的调用。
field_offset
- 数值型字段偏移量。
field_offset
从0
开始。如果field_offset
不存在,则会发出一个E_WARNING
级别的错误
返回值
The returned field type
will be one of "int"
, "real"
,
"string"
, "blob"
, and others as
detailed in the [http://dev.mysql.com/doc/ » MySQL
documentation].
范例
Example #2 mysql_field_type() example
<?phpmysql_connect("localhost", "mysql_username", "mysql_password");mysql_select_db("mysql");$result = mysql_query("SELECT * FROM func");$fields = mysql_num_fields($result);$rows = mysql_num_rows($result);$table = mysql_field_table($result, 0);echo "Your '" . $table . "' table has " . $fields . " fields and " . $rows . " record(s)\n";echo "The table has the following fields:\n";for ($i=0; $i < $fields; $i++) { $type = mysql_field_type($result, $i); $name = mysql_field_name($result, $i); $len = mysql_field_len($result, $i); $flags = mysql_field_flags($result, $i); echo $type . " " . $name . " " . $len . " " . $flags . "\n";}mysql_free_result($result);mysql_close();?>
以上例程的输出类似于:
Your 'func' table has 4 fields and 1 record(s) The table has the following fields: string name 64 not_null primary_key binary int ret 1 not_null string dl 128 not_null string type 9 not_null enum
注释
Note:
为了向下兼容,可以使用下列已废弃的别名: mysql_fieldtype()