Php/docs/function.pg-update

• PHP Manual
• PostgreSQL Functions
• Update table

pg_update

(PHP 4 >= 4.3.0, PHP 5, PHP 7)

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

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";  }?>

Changelog

Version	Description
5.6.0	No longer experimental. Added PGSQL_DML_ESCAPE constant, TRUE/FALSE and NULL data type support.
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 forms suitable for SQL statements