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The mysql_field_seek() function jumps to a specified field in a recordset.
mysql_field_seek()函数的作用是:跳到一条记录中制定的字段。
This function returns TRUE on success, or FALSE and a warning on failure.
如果该函数成功执行,则返回True;如果执行失败,则返回False,并给出警告提示。
mysql_field_seek(data,field_offset) |
Parameter 参数 | Description 描述 |
---|---|
data | Required. Specifies which data pointer to use. The data pointer is the result from the mysql_query() function 必要参数。指定需要使用的数据指针[data pointer]。该数据指针是通过请求mysql_query()函数返回的。 |
field_offset | Required. Specifies which field to jump to. 0 indicates the first field 可选参数。指定字段的起始位置。0表示第一个字段。 |
<?php $con = mysql_connect("localhost", "peter", "abc123"); if (!$con) { die('Could not connect: ' . mysql_error()); } $db_selected = mysql_select_db("test_db",$con); $sql = "SELECT * from Person"; $result = mysql_query($sql,$con); // Jump to the fourth field mysql_field_seek($result,3); print_r(mysql_fetch_field($result)); mysql_close($con); ?> |
The output of the code above could be:
上述代码将输出下面的结果:
stdClass Object ( [name] => Age [table] => Person [def] => [max_length] => 2 [not_null] => 0 [primary_key] => 0 [multiple_key] => 0 [unique_key] => 0 [numeric] => 1 [blob] => 0 [type] => int [unsigned] => 0 [zerofill] => 0 ) |