pg_field_name
(PHP 4 >= 4.2.0, PHP 5, PHP 7, PHP 8)
pg_field_name — 返回欄位的名字
說明
pg_field_name(resource
$result, int $field_number): string
pg_field_name() 返回給定 PostgreSQL result 資源中的 field_number 所代表的欄位名。欄位編號從 0 開始。
示例 #1 獲取欄位資訊
<?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";
}
?>
上例的輸出如下：
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
注意:
本函式以前的名字為
pg_fieldname()。
參見 pg_field_num()。