pg_fetch_result
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.
pg_fetch_row
(PHP 4, PHP 5)
pg_fetch_row — Get a row as an enumerated array
Описание
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.
Забележка: Тази функция установява NULL полетата със стойността null; в PHP.
Параметри
- 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, next row is fetched.
Връщани стойности
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.
Дневник на промените
| Версия | Описание |
|---|---|
| 4.1.0 | The parameter row became optional. |
Примери
Example #1 pg_fetch_row() example
<?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: $row[1]";
echo "<br />\n";
}
?>
Вж. също
- pg_query() - Изпълнява заявка
- pg_fetch_array() - Изважда ред под формата на масив
- pg_fetch_object() - Изважда ред под формата на обект
- pg_fetch_result() - Returns values from a result resource
add a note
User Contributed Notes
pg_fetch_row - [7 notes]
eddie at eddiemonge dot com ¶
3 years ago
pletiplot at seznam dot cz ¶
6 years ago
Note, that when you retrieve some PG boolean value, you get 't' or 'f' characters which are not compatible with PHP bool.
post at zeller-johannes dot de ¶
8 years ago
I wondered whether array values of PostgreSQL are converted to PHP arrays by this functions. This is not the case, they are stored in the returned array as a string in the form "{value1 delimiter value2 delimiter value3}" (See http://www.postgresql.org/docs/8.0/interactive/arrays.html#AEN5389).
maxnamara at yahoo dot com ¶
8 years ago
Get downlines, put them into arrays.
function get_downlines($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 $info_elements;
}
Matthew Wheeler ¶
10 years ago
Note that the internal row counter is incremented BEFORE the row is retrieved. This causes an off by one error if you try to do:
pg_result_seek($resid,0);
pg_fetch_row($resid);
you will get back the SECOND result not the FIRST.
imantr at cbn dot net dot id ¶
10 years ago
I use the following code to assigning query result to an array.
while ($row = pg_fetch_row($result)) $newArray[] = $row[0];
print_r($newArray);
darw75 at swbell dot net ¶
11 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>";
}