09-07-2010
i must switch the user for this action.
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PG_QUERY(3) PG_QUERY(3)
pg_query - Execute a query
SYNOPSIS
resource pg_query ([resource $connection], string $query)
DESCRIPTION
pg_query(3) executes the $query on the specified database $connection. pg_query_params(3) should be preferred in most cases.
If an error occurs, and FALSE is returned, details of the error can be retrieved using the pg_last_error(3) function if the connection is
valid.
Note
Although $connection can be omitted, it is not recommended, since it can be the cause of hard to find bugs in scripts.
Note
This function used to be called pg_exec(3). pg_exec(3) is still available for compatibility reasons, but users are encouraged to
use the newer name.
PARAMETERS
o $connection
- PostgreSQL database connection resource. When $connection is not present, the default connection is used. The default connection
is the last connection made by pg_connect(3) or pg_pconnect(3).
o $query
- The SQL statement or statements to be executed. When multiple statements are passed to the function, they are automatically exe-
cuted as one transaction, unless there are explicit BEGIN/COMMIT commands included in the query string. However, using multiple
transactions in one function call is not recommended.
Warning
String interpolation of user-supplied data is extremely dangerous and is likely to lead to SQL injection vulnerabilities. In
most cases pg_query_params(3) should be preferred, passing user-supplied values as parameters rather than substituting them
into the query string.
Any user-supplied data substituted directly into a query string should be properly escaped.
RETURN VALUES
A query result resource on success or FALSE on failure.
EXAMPLES
Example #1
pg_query(3) example
<?php
$conn = pg_pconnect("dbname=publisher");
if (!$conn) {
echo "An error occurred.
";
exit;
}
$result = pg_query($conn, "SELECT author, email FROM authors");
if (!$result) {
echo "An error occurred.
";
exit;
}
while ($row = pg_fetch_row($result)) {
echo "Author: $row[0] E-mail: $row[1]";
echo "<br />
";
}
?>
Example #2
Using pg_query(3) with multiple statements
<?php
$conn = pg_pconnect("dbname=publisher");
// these statements will be executed as one transaction
$query = "UPDATE authors SET author=UPPER(author) WHERE id=1;";
$query .= "UPDATE authors SET author=LOWER(author) WHERE id=2;";
$query .= "UPDATE authors SET author=NULL WHERE id=3;";
pg_query($conn, $query);
?>
SEE ALSO
pg_connect(3), pg_pconnect(3), pg_fetch_array(3), pg_fetch_object(3), pg_num_rows(3), pg_affected_rows(3).
PHP Documentation Group PG_QUERY(3)