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PostgreSQL Functions
PHP Manual

# pg_update

(PHP 4 >= 4.3.0, PHP 5)

pg_update — Update table

### Description

mixed pg_update ( resource `$connection` , string `$table_name` , array `$data` , array `$condition` [, int `$options` = PGSQL_DML_EXEC ] )

pg_update() updates records that matches condition with data. If options is specified, pg_convert() is applied to data with specified options.

Warning

This function is EXPERIMENTAL. The behaviour of this function, its name, and surrounding documentation may change without notice in a future release of PHP. This function should be used at your own risk.

### 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_OPTS`, `PGSQL_DML_NO_CONV`, `PGSQL_DML_EXEC` or `PGSQL_DML_STRING` combined. If `PGSQL_DML_STRING` is part of the `options` then query string is returned.

### 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, since $_POST is converted automatically
$res = pg_update($db, 'post_log', $_POST, $data);
if ($res) {
echo "Data is updated: $res\n";
} else {
echo "User must have sent wrong inputs\n";
}
?>`

### Changelog

Version | Description
--- | ---
5.5.3/5.4.19 | Direct SQL injection to `table_name` and Indirect SQL injection to identifiers are fixed.

### See Also

- pg_convert() - Convert associative array values into suitable for SQL statement

pg_untrace
pg_version
PostgreSQL Functions
PHP Manual