pg_fetch_row

(PHP 4, PHP 5)

pg_fetch_rowGet a row as an enumerated array

Descripción

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

pg_fetch_row() fetches one row of data from the result associated with the specified result resource.

Nota: Esta función define campos NULOS al valor NULL de PHP.

Parámetros

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.

Valores devueltos

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

FALSE is returned if row exceeds the number of rows in the set, there are no more rows, or on any other error.

Ejemplos

Ejemplo #1 pg_fetch_row() example

<?php

$conn 
pg_pconnect("dbname=publisher");
if (!
$conn) {
  echo 
"An error occurred.\n";
  exit;
}

$result pg_query($conn"SELECT author, email FROM authors");
if (!
$result) {
  echo 
"An error occurred.\n";
  exit;
}

while (
$row pg_fetch_row($result)) {
  echo 
"Author: $row[0]  E-mail: $row[1]";
  echo 
"<br />\n";
}
 
?>

Ver también

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User Contributed Notes 7 notes

up
1
pletiplot at seznam dot cz
8 years ago
Note, that when you retrieve some PG boolean value, you get 't' or 'f' characters which are not compatible with PHP bool.
up
0
eddie at eddiemonge dot com
4 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.
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0
post at zeller-johannes dot de
9 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).
up
0
Matthew Wheeler
11 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.
up
0
darw75 at swbell dot net
13 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>";
  }
up
-1
maxnamara at yahoo dot com
9 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;
}
up
-2
imantr at cbn dot net dot id
12 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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