pg_fetch_row

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

pg_fetch_rowGet a row as an enumerated array

Description

pg_fetch_row(PgSql\Result $result, ?int $row = null, int $mode = PGSQL_NUM): array|false

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

Note: This function sets NULL fields to the PHP null value.

Parameters

result

An PgSql\Result instance, 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.

mode

An optional parameter that controls how the returned array is indexed. mode is a constant and can take the following values: PGSQL_ASSOC, PGSQL_NUM and PGSQL_BOTH. Using PGSQL_NUM, the function will return an array with numerical indices, using PGSQL_ASSOC it will return only associative indices while PGSQL_BOTH will return both numerical and associative indices.

Return Values

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.

Changelog

Version Description
8.1.0 The result parameter expects an PgSql\Result instance now; previously, a resource was expected.

Examples

Example #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";
}

?>

See Also

add a note

User Contributed Notes 5 notes

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5
post at zeller-johannes dot de
19 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
3
pletiplot at seznam dot cz
18 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
15 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
darw75 at swbell dot net
23 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
Matthew Wheeler
21 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.
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