pg_fetch_row()

(PHP 4, PHP 5, PHP 7)

提取一行作为枚举数组

说明

pg_fetch_row(resource $result[,int $row]): array

pg_fetch_row()根据指定的$result资源提取一行数据（记录）作为数组返回。每个得到的列依次存放在数组中，从偏移量 0 开始。

Note:此函数将 NULL 字段设置为 PHP NULL值。

参数

$result: PostgreSQL query result resource, returned by pg_query(),pg_query_params() or pg_execute()(among others).
$row: Row number in result to fetch. Rows are numbered from 0 upwards. If omitted or NULL, the next row is fetched.

返回值

An array, indexed from 0 upwards, with each value represented as a string. DatabaseNULLvalues are returned as NULL.

返回的数组和提取的行相一致。如果没有更多行$row可提取，则返回FALSE。

更新日志

版本	说明
4.1.0	参数`$row`成为可选参数。

范例

Example #1 pg_fetch_row()例子

<?php
$conn = pg_pconnect("dbname=publisher");
if (!$conn) {
  echo "An error occured.\n";
  exit;
}
$result = pg_query($conn, "SELECT author, email FROM authors");
if (!$result) {
  echo "An error occured.\n";
  exit;
}
while ($row = pg_fetch_row($result)) {
  echo "Author: $row[0]  E-mail: $row[1]";
  echo "<br />\n";
}
 
?>

参见

pg_query()执行查询
pg_fetch_array()提取一行作为数组
pg_fetch_object()提取一行作为对象
pg_fetch_result()从结果资源中返回值

Note, that when you retrieve some PG boolean value, you get 't' or 'f' characters which are not compatible with PHP bool.

I wondered whether array values of PostgreSQL are converted to PHP arrays by this functions. This is not the case, they are stored in the returned array as a string in the form "{value1 delimiter value2 delimiter value3}" (See http://www.postgresql.org/docs/8.0/interactive/arrays.html#AEN5389).

pg_fetch_row is faster than pg_fetch_assoc when doing a query with * as the select parameter. Otherwise, with declared columns, the two are similar in speed.

a way to do this with 2 loops to insert data into a table...
$num = pg_numrows($result);
$col_num = pg_numfields($result);
for ($i=0; $i<$num; $i++) {
 $line = pg_fetch_array($result, $i, PGSQL_ASSOC);
 print "\t<tr bgcolor=#dddddd>\n";
  for ($j=0; $j<$col_num; $j++){
  list($col_name, $col_value) =each($line);
  print "\t\t<TD ALIGN=RIGHT><FONT SIZE=1 FACE='Geneva'>$col_value</FONT></TD>\n";
  }
 echo "<br>";
 }

Note that the internal row counter is incremented BEFORE the row is retrieved. This causes an off by one error if you try to do:
pg_result_seek($resid,0);
pg_fetch_row($resid);
you will get back the SECOND result not the FIRST.

Get downlines, put them into arrays.
function get_downlines($my_code){
  global $link;
  $sql = "select user_id, name from tb_user where parentcode = $my_code";
  $res = pg_query($link,$sql);
  if(!$res){
    echo "Error: ".$sql;exit();
  }
  $num_fields = pg_num_fields($res);
  $info_rows = 0;
  $num_rows = pg_num_rows($res);
  while($arr = pg_fetch_row($res)){
      $info_offset = 1;
     $info_columns = 0;
    while ($info_offset <= $num_fields) {
         $info_elements[$info_rows][$info_columns] = $arr[$info_columns];
         $info_offset++; $info_columns++;
    }
    $info_rows++;      
  }
return $info_elements;
}

I use the following code to assigning query result to an array.
while ($row = pg_fetch_row($result)) $newArray[] = $row[0];
print_r($newArray);