mysql_field_type

(PHP 4, PHP 5)

mysql_field_type 取得结果集中指定字段的类型

警告

本扩展自 PHP 5.5.0 起已废弃,并在自 PHP 7.0.0 开始被移除。应使用 MySQLiPDO_MySQL 扩展来替换之。参见 MySQL:选择 API 指南来获取更多信息。用以替代本函数的有:

说明

mysql_field_type(resource $result, int $field_offset): string

mysql_field_type()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

示例 #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_offset0 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 » MySQL documentation.

示例

示例 #2 mysql_field_type() example

<?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();
?>

以上示例的输出类似于:

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

注意:

为了向下兼容,可以使用下列已废弃的别名: mysql_fieldtype()

参见