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<pg_field_is_nullpg_field_num>
Last updated: Mon, 16 Jul 2012

pg_field_name

(PHP 4 >= 4.2.0, PHP 5)

pg_field_name -- 返回字段的名字

说明

string pg_field_name ( resource result, int field_number )

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。

例子 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

注: 本函数以前的名字为 pg_fieldname()

参见 pg_field_num()




<pg_field_is_nullpg_field_num>
 Last updated: Mon, 16 Jul 2012
 
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