ConFoo Montreal 2017 Calling for Papers

pg_fetch_row

(PHP 4, PHP 5)

pg_fetch_rowCarica una tupla in un array

Descrizione

array pg_fetch_row ( resource $result , int $tupla )

pg_fetch_row() carica un record dal risultato della query associato alla risorsa identificata da result. La riga (record) è restituia sotto form di array. Ogni campo è identificato da un indice numerico, che inizia da 0.

Restituisce un array che corrisponde alla riga caricata, oppure FALSE se non ci sono altre tuple.

Example #1 Postgres fetch row

<?php 
$conn 
pg_pconnect ("dbname=editori");
if (!
$conn) {
    echo 
"Si è verificato un errore.\n";
    exit;
}

$result pg_query ($conn"SELECT * FROM autori");
if (!
$rrisultato) {
    echo 
"Si è verificato un errore.\n";
    exit;
}

while (
$row pg_fetch_row($risultato$i)) {
  for (
$j=0$j count($row); $j++) {
    echo 
"$row[$j]&nbsp;";
  }

  echo 
"<BR>";

}
 
?>

Vedere anche pg_query(), pg_fetch_array(), pg_fetch_object() e pg_fetch_result().

Nota:

Dalla versione 4.1.0, row è opzionale. La chiamata a pg_fetch_row() incrementa il puntatore alle tuple di 1.

add a note add a note

User Contributed Notes 7 notes

up
0
eddie at eddiemonge dot com
6 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.
up
0
pletiplot at seznam dot cz
10 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
post at zeller-johannes dot de
11 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
darw75 at swbell dot net
15 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
-2
maxnamara at yahoo dot com
11 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
Matthew Wheeler
13 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
-5
imantr at cbn dot net dot id
14 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);
To Top