270 lines
7.7 KiB
PHP
270 lines
7.7 KiB
PHP
<?
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/*********************************************************************
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* AUTHOR: Clemens "Gullevek" Schwaighofer (www.gullevek.org)
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* CREATED: 2003/04/09
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* SHORT DESCRIPTION:
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* pgsq; wrapper calls
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* HISTORY:
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* 2008/04/16 (cs) wrapper for pg escape string
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* 2007/01/11 (cs) add prepare/execute for postgres
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* 2006/09/12 (cs) in case db_query retuns false, save the query and run the query through the send/get procedure to get correct error data from the db
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* 2006/06/26 (cs) added port for db connection
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* 2006/04/03 (cs) added meta data for table
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* 2005/07/25 (cs) removed the plural s remove, not needed and not 100% working
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* 2005/07/07 (cs) the default it is table_name _ id
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* 2005/01/19 (cs) changed the pgsql connect, so it dies if it can't connect to the DB
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* 2004/09/30 (cs) layout cleanup
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* /
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/* collection of PostgreSQL wrappers
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* REQUIRES 5.4 PHP!!! (should do check for this)
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*
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* pg_prepare
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* pg_execute
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* pg_num_rows
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* pg_num_fields
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* pg_field_name
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* pg_affected_rows (*)
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* pg_fetch_array
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* pg_query
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* pg_close
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* pg_connect (*)
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* pg_meta_data
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* pg_escape_string
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*
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*/
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trait db_pgsql
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{
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private $last_error_query;
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private $currval_query;
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// METHOD: _db_query
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// PARAMS: query, database handler
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// RETURN: query result
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// DESC : wrapper for gp_query, catches error and stores it in class var
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private function _db_query($query, $dbh)
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{
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// read out the query status and save the query if needed
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$result = @pg_query($dbh, $query);
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if (!$result)
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{
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$this->last_error_query = $query;
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}
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return $result;
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}
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// METHOD: _db_close
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// PARAMS: database handler
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// RETURN: none
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// DESC : wrapper for pg_close
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private function _db_close($dbh)
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{
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pg_close($dbh);
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}
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// METHOD: _db_prepare
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// PARAMS: database handler, prepare name, query
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// RETURN: prepared statement handler
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// DESC : wrapper for pg_prepare
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private function _db_prepare($dbh, $name, $query)
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{
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return @pg_prepare($dbh, $name, $query);
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}
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// METHOD: _db_execute
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// PARAMS: database handler, prepare name, data for query
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// RETURN: returns status
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// DESC : wrapper for pg_execute for running a prepared statement
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private function _db_execute($dbh, $name, $data)
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{
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return @pg_execute($dbh, $name, $data);
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}
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// METHOD: _db_num_rows
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// PARAMS: cursor
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// RETURN: rows
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// DESC : wrapper for pg_num_rows
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private function _db_num_rows($cursor)
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{
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return pg_num_rows($cursor);
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}
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// METHOD: _db_num_fields
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// PARAMS: cursor
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// RETURN: number for fields in query
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// DESC : wrapper for pg_num_fields
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private function _db_num_fields($cursor)
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{
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return pg_num_fields($cursor);
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}
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// METHOD: _db_field_name
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// PARAMS: cursor, field position
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// RETURN: name of field
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// DESC : wrapper for pg_field_name
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private function _db_field_name($cursor, $i)
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{
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return pg_field_name($cursor, $i);
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}
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// METHOD: _db_fetch_array
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// PARAMS: cursor
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// RETURN: row
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// DESC : wrapper for pg_fetch_array
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private function _db_fetch_array($cursor)
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{
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return pg_fetch_array($cursor);
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}
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// METHOD: _db_affected_ros
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// PARAMS: database handler, cursor
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// RETURN: number for rows
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// DESC : wrapper for pg_affected_rows
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private function _db_affected_rows($dbh, $cursor)
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{
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return pg_affected_rows($cursor);
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}
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// METHOD: _db_insert_id
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// PARAMS: database handler, query, primary key name
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// RETURN: last insert primary key
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// DESC : reads the last inserted primary key for the query
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// if ther is no pk_name tries to auto built it from the table name
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// this only works if db schema is after "no plural names. and pk name is table name + _id
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// detects schema prefix in table name
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private function _db_insert_id($dbh, $query, $pk_name)
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{
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// only if an insert has been done
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if (preg_match("/^insert /i", $query))
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{
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// get table name from insert
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$array = explode(' ', $query);
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$_table = $array[2];
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// if there is a dot inside, we need to split
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if (strstr($_table, '.'))
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list($schema, $table) = explode('.', $_table);
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else
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$table = $_table;
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// no PK name given at all
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if (!$pk_name)
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{
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// if name is plurar, make it singular
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// if (preg_match("/.*s$/i", $table))
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// $table = substr($table, 0, -1);
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// set pk_name to "id"
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$pk_name = $table."_id";
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}
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$seq = (($schema) ? $schema.'.' : '').$table."_".$pk_name."_seq";
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$q = "SELECT CURRVAL('$seq') AS insert_id";
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$this->currval_query = $q;
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//echo "Q: $q<Br>";
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// I have to do manually or I overwrite the original insert internal vars ...
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if ($q = @pg_query($dbh, $q))
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{
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list($id) = pg_fetch_array($q);
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}
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else
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{
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$id = array(-1, $q);
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}
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return $id;
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}
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}
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// METHOD: _db_connect
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// PARAMS: host name, user name, password, database name, optional port (defaults to default postgres port), optional ssl (default allow)
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// RETURN: database handler
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// DESC : wrapper for pg_connect, writes out failure to screen if error occurs (hidden var)
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private function _db_connect($db_host, $db_user, $db_pass, $db_name, $db_port = 5432, $db_ssl = 'allow')
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{
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// to avoid empty db_port
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if (!$db_port)
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{
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$db_port = 5432;
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}
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$this->dbh = @pg_connect("host=".$db_host." port=".$db_port." user=".$db_user." password=".$db_pass." dbname=".$db_name." sslmode=".$db_ssl);
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if (!$this->dbh)
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{
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die("<!-- Can't connect [host=".$db_host." port=".$db_port." user=".$db_user." password=XXXX dbname=".$db_name." sslmode=".$db_ssl."] //-->");
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}
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return $this->dbh;
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}
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// METHOD: _db_print_error
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// PARAMS: database handler, cursor
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// RETURN: error string (HTML)
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// DESC : reads the last error for this cursor
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private function _db_print_error($dbh, $cursor = '')
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{
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// run the query again for the error result here
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if (!$cursor && $this->last_error_query)
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{
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pg_send_query($dbh, $this->last_error_query);
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$this->last_error_query = "";
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$cursor = pg_get_result($dbh);
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}
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if (pg_result_error($cursor))
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return "<span style=\"color: red;\"><b>-PostgreSQL-Error-></b> ".pg_result_error($cursor)."</span><br>";
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}
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// METHOD: _db_meta_data
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// PARAMS: database handler, table name
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// RETURN: array with table data
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// DESC : wrapper for pg_emta_data
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private function _db_meta_data($dbh, $table)
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{
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return @pg_meta_data($dbh, $table);
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}
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// METHOD: _db_escape_string
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// PARAMS: string
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// RETURN: escaped string for postgres
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// DESC : wrapper for pg_escape_string
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private function _db_escape_string($string)
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{
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return pg_escape_string($this->dbh, $string);
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}
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// METHOD: _db_escape_bytea
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// PARAMS: string
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// RETURN: escape bytes for postgres
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// DESC : wrapper for pg_escape_bytea
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private function _db_escape_bytea($bytea)
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{
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return pg_escape_bytea($this->dbh, $bytea);
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}
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// METHOD: _db_array_parse
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// PARAMS: input text, output array [needed]
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// [internal] limit: are we at the end of the parse
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// [internal] offset: shift for {}
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// RETURN: array with the elements
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// DESC : postgresql array to php array
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private function _db_array_parse($text, &$output, $limit = false, $offset = 1)
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{
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if (false === $limit)
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{
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$limit = strlen($text) - 1;
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$output = array();
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}
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if ('{}' != $text)
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do
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{
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if ('{' != $text{$offset})
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{
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preg_match("/(\\{?\"([^\"\\\\]|\\\\.)*\"|[^,{}]+)+([,}]+)/", $text, $match, 0, $offset);
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$offset += strlen($match[0]);
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$output[] = ('"' != $match[1]{0} ? $match[1] : stripcslashes(substr($match[1], 1, -1)));
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if ('},' == $match[3])
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return $offset;
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}
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else
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$offset = pg_array_parse($text, $output[], $limit, $offset + 1);
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}
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while ($limit > $offset);
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return $output;
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}
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}
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?>
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