pg_fetch_result

Returns values from a result resource (PHP 4 >= 4.2.0, PHP 5)
string pg_fetch_result ( resource result, int row, mixed field )

string pg_fetch_result ( resource result, mixed field )

pg_fetch_result() returns the value of a particular row and field (column) in a PostgreSQL result resource.

Note:

This function used to be called pg_result().

Parameters

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.
field: A string representing the name of the field (column) to fetch, otherwise and int representing the field number to fetch. Fields are numbered from 0 upwards.

Return Values

Boolean is returned as "t" or "f". All other types, including arrays are returned as strings formatted in the same default PostgreSQL manner that you would see in the psql program. Database NULL values are returned as NULL.

FALSE is returned if row exceeds the number of rows in the set, or on any other error.

Examples

Example 1924. pg_fetch_result() example

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<?php

$db = pg_connect("dbname=users user=me") || die();

$res = pg_query($db, "SELECT 1 UNION ALL SELECT 2");

$val = pg_fetch_result($res, 1, 0);


echo "First field in the second row is: ", $val, "\n";
?>

The above example will output:

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First field in the second row is: 2

See Also

pg_query()

pg_fetch_array()

Code Examples / Notes » pg_fetch_result

akbar

Use can use pg_fetch_result when getting a value (like a smallint as in this example) returned by your stored procedure <?php $pgConnection = pg_connect("dbname=users user=me"); $userNameToCheckFor = "metal"; $result = pg_query($pgConnection, "SELECT howManyUsersHaveThisName('$userNameToCheckFor')"); $count = pg_fetch_result($result, 0, 'howManyUsersHaveThisName'); ?>

alan u. kennington

See bug #33809 http://bugs.php.net/bug.php?id=33809 Whether this really is a bug or a feature is not clear. However, it is probably best to always put your column names in extra quotes. $res = pg_query(...); $colname = pg_field_name($res, $j); pg_fetch_result($res, $i, "\"$colname\"");

alan u kennington

In order to use upper case in pg_fetch_result column names, it is apparently necessary to include explicit quotation marks. Thus when I do this sort of thing: $res = pg_query(...); $ncols = pg_num_fields($res); for ($j = 0; $j < $ncols; ++$j) { $colname[$j] = pg_field_name($res, $j); $name = htmlspecialchars($colname[$j]); print("Column $j name = \"$name\"\n"); $value = htmlspecialchars(pg_fetch_result($res, 0, $colname[$j])); print("Column \"{$colname[$j]}\" value = \"$value\"\n"); } I get this sort of thing: [....] Warning: pg_fetch_result() [function.pg-fetch-result]: Bad column offset specified in /.../view.php on line 247 Column 8 name = "VEC index" Column "VEC index" value = "" But if I change the $value line to this: $value = htmlspecialchars(pg_fetch_result($res, 0, "\"$colname[$j]\"")); I get this: [...] Column 8 name = "VEC index" Column "VEC index" value[0] = "47" In my opinion, pg_fetch_result(...) should use the quotes already. In other words, this may be a bug in the PHP postgres library. It does not seem to be a documented feature of pg_fetch_result() although the postgresql manual documents it under "SQL syntax", "Lexical structure". PHP version 5.1.4. psql version 8.1.4.

newby_at_nobletec_dot_com

Comment on boolean fields: If you retrieve a boolean value from the PostgreSQL database, be aware that the value returned will be either the character 't' or the character 'f', not an integer. So, the statement if (pg_fetch_result($rsRecords,0,'blnTrueFalseField')) { echo "TRUE"; } else { echo "FALSE"; } will echo "TRUE" in either case (True or False stored in the field). In order to work as expected, do this instead: if (pg_fetch_result($rsRecords,0,'blnTrueFalseField') == 't') { echo "TRUE"; } else { echo "FALSE"; }

pg_fetch_result

Returns values from a result resource (PHP 4 >= 4.2.0, PHP 5) string pg_fetch_result ( resource result, int row, mixed field ) string pg_fetch_result ( resource result, mixed field )

Parameters

Return Values

Examples

Example 1924. pg_fetch_result() example

Code Examples / Notes » pg_fetch_result

Change Language

Returns values from a result resource (PHP 4 >= 4.2.0, PHP 5)
string pg_fetch_result ( resource result, int row, mixed field )

string pg_fetch_result ( resource result, mixed field )