pg_update
(PHP 4 >= 4.3.0, PHP 5, PHP 7, PHP 8)
pg_update —
Update table
Description
pg_update(
resource $connection
,
string $table_name
,
array $data
,
array $condition
,
int $options
= PGSQL_DML_EXEC):
mixed
pg_update() updates records specified by
assoc_array
which has
field=>value
.
If options
is specified,
pg_convert() is applied to
assoc_array
with the specified flags.
By default pg_update() passes raw values. Values
must be escaped or PGSQL_DML_ESCAPE option must be
specified. PGSQL_DML_ESCAPE quotes and escapes
parameters/identifiers. Therefore, table/column names became case
sensitive.
Note that neither escape nor prepared query can protect LIKE query,
JSON, Array, Regex, etc. These parameters should be handled
according to their contexts. i.e. Escape/validate values.
Parameters
-
connection
-
PostgreSQL database connection resource.
-
table_name
-
Name of the table into which to update rows.
-
data
-
An array whose keys are field names in the table table_name
,
and whose values are what matched rows are to be updated to.
-
condition
-
An array whose keys are field names in the table table_name
,
and whose values are the conditions that a row must meet to be updated.
-
options
-
Any number of PGSQL_CONV_FORCE_NULL
,
PGSQL_DML_NO_CONV
,
PGSQL_DML_ESCAPE
,
PGSQL_DML_EXEC
,
PGSQL_DML_ASYNC
or
PGSQL_DML_STRING
combined. If PGSQL_DML_STRING
is part of the
options
then query string is returned. When PGSQL_DML_NO_CONV
or PGSQL_DML_ESCAPE
is set, it does not call pg_convert() internally.
Return Values
Returns true
on success or false
on failure. Returns string if PGSQL_DML_STRING
is passed
via options
.
Examples
Example #1 pg_update() example
<?php
$db = pg_connect('dbname=foo');
$data = array('field1'=>'AA', 'field2'=>'BB');
// This is safe somewhat, since all values are escaped.
// However PostgreSQL supports JSON/Array. These are not
// safe by neither escape nor prepared query.
$res = pg_update($db, 'post_log', $_POST, $data);
if ($res) {
echo "Data is updated: $res\n";
} else {
echo "User must have sent wrong inputs\n";
}
?>
See Also
- pg_convert() - Convert associative array values into forms suitable for SQL statements