Php/docs/function.pg-field-name

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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()