pg_update
(PHP 4 >= 4.3.0, PHP 5, PHP 7, PHP 8)
pg_update — Update table
Description
pg_update(
PgSql\Connection $connection,
string $table_name,
array $values,
array $conditions,
int $flags = PGSQL_DML_EXEC
): string|boolpg_update() updates records that matches conditions with values.
If flags is specified, pg_convert() is applied to values with the specified flags.
By default pg_update() passes raw values. Values must be escaped or the PGSQL_DML_ESCAPE flag must be specified in flags. PGSQL_DML_ESCAPE quotes and escapes parameters/identifiers. Therefore, table/column names become 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-
An PgSql\Connection instance.
table_name-
Name of the table into which to update rows.
values-
An array whose keys are field names in the table
table_name, and whose values are what matched rows are to be updated to. conditions-
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. flags-
Any number of
PGSQL_CONV_FORCE_NULL,PGSQL_DML_NO_CONV,PGSQL_DML_ESCAPE,PGSQL_DML_EXEC,PGSQL_DML_ASYNCorPGSQL_DML_STRINGcombined. IfPGSQL_DML_STRINGis part of theflagsthen query string is returned. WhenPGSQL_DML_NO_CONVorPGSQL_DML_ESCAPEis 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 flags.
Changelog
| Version | Description |
|---|---|
| 8.1.0 | The connection parameter expects an PgSql\Connection instance now; previously, a resource was expected. |
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
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Licensed under the Creative Commons Attribution License v3.0 or later.
https://www.php.net/manual/en/function.pg-update.php