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# 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] )

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, the name of this function, and anything else documented about this function may change without notice in a future release of PHP. Use this function 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"; } ?>`

## See Also

pg_convert()

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