Here is a simple example for using pg_num_feilds, pg_num_rows and pg_result together. I'm simply SELECTing * from a table named markie on the current pg_connect().
<?php
$pgsql_conn = pg_connect("dbname=mark host=localhost");
if (!$pgsql_conn) {
print pg_last_error($pgsql_conn);
exit;
}
$results = pg_query($pgsql_conn, "SELECT * FROM markie");
echo "<table border=1>\n";
for($lt = 0; $lt < pg_num_rows($results); $lt++) {
echo "<tr>\n";
for($gt = 0; $gt < pg_num_fields($results); $gt++) {
echo "<td>" . pg_result($results, $lt, $gt) . "</td>\n";
}
echo "</tr>\n";
}
echo "</table>\n";
pg_close($pgsql_conn);
?>
This code snippet will print out the rows and columns into a HTML table.
Regards, --mark
pg_num_fields
(PHP 4 >= 4.2.0, PHP 5, PHP 7)
pg_num_fields — Returns the number of fields in a result
Descrierea
pg_num_fields
( resource
$result
) : intpg_num_fields() returns the number of fields (columns) in a PostgreSQL result resource.
Notă:
This function used to be called pg_numfields().
Parametri
-
result -
PostgreSQL query result resource, returned by pg_query(), pg_query_params() or pg_execute() (among others).
Valorile întoarse
The number of fields (columns) in the result. On error, -1 is returned.
Exemple
Example #1 pg_num_fields() example
<?php
$result = pg_query($conn, "SELECT 1, 2");
$num = pg_num_fields($result);
echo $num . " field(s) returned.\n";
?>
Exemplul de mai sus va afișa:
2 field(s) returned.
A se vedea și
- pg_num_rows() - Returns the number of rows in a result
- pg_affected_rows() - Returns number of affected records (tuples)
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User Contributed Notes 1 note
mark at redbrick dot dcu dot ie ¶
21 years ago
