PHP - Manual: pg_fetch_row

2024-11-15

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pg_fetch_row

(PHP 4, PHP 5, PHP 7, PHP 8)

pg_fetch_row — 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。

注意: 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. Database NULL values 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

示例 #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

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User Contributed Notes 7 notes

down

pletiplot at seznam dot cz ¶

16 years ago


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

down

post at zeller-johannes dot de ¶

17 years ago


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).

down

darw75 at swbell dot net ¶

20 years ago


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>";

  }

down

eddie at eddiemonge dot com ¶

12 years ago


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.

down

-1

Matthew Wheeler ¶

19 years ago


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.

down

-6

maxnamara at yahoo dot com ¶

17 years ago


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;
}

down

-8

imantr at cbn dot net dot id ¶

19 years ago


I use the following code to assigning query result to an array.

while ($row = pg_fetch_row($result)) $newArray[] = $row[0];

print_r($newArray);

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官方地址：https://www.php.net/manual/en/function.pg-fetch-row.php

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pg_fetch_row

说明

参数

返回值

更新日志

范例

参见

User Contributed Notes 7 notes