Php/docs/function.pg-field-name
pg_field_name
(PHP 4 >= 4.2.0, PHP 5, PHP 7)
pg_field_name — 返回字段的名字
说明
pg_field_name
( resource $result
, int $field_number
) : string
pg_field_name() 返回给定 PostgreSQL result
资源中的 field_number
所代表的字段名。字段编号从 0 开始。
Example #1 获取字段信息
<?php $dbconn = pg_connect("dbname=publisher") or die("Could not connect"); $res = pg_query($dbconn, "select * from authors where author = 'Orwell'"); $i = pg_num_fields($res); for ($j = 0; $j < $i; $j++) { echo "column $j\n"; $fieldname = pg_field_name($res, $j); echo "fieldname: $fieldname\n"; echo "printed length: ".pg_field_prtlen($res, $fieldname)." characters\n"; echo "storage length: ".pg_field_size($res, $j)." bytes\n"; echo "field type: ".pg_field_type($res, $j)." \n\n";}?>
上例的输出如下:
column 0 fieldname: author printed length: 6 characters storage length: -1 bytes field type: varchar column 1 fieldname: year printed length: 4 characters storage length: 2 bytes field type: int2 column 2 fieldname: title printed length: 24 characters storage length: -1 bytes field type: varchar
Note:
本函数以前的名字为
pg_fieldname()
。
参见 pg_field_num()。