Clemens Schwaighofer
7d42256a30
- all if/while/for/etc blocks have brackets on same line - functions have brackets on new line - no blocks without brackets - all code starts on col 0 and there are no tab intends anymore off: came case for classes and class methods ignore: _ prefix functions (we can't change that anymore)
376 lines
10 KiB
PHP
376 lines
10 KiB
PHP
<?
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/*********************************************************************
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* AUTHOR: Clemens "Gullevek" Schwaighofer (www.gullevek.org)
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* CREATED: 2014/12/3
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* SHORT DESCRIPTION:
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* pgsql pdo wrapper calls
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* HISTORY:
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* /
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/* collection of PostgreSQL wrappers
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* REQUIRES 5.x PHP with compiled pdo pgsql (--with-pdo-pgsql)
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*
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*/
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class db_pgsql
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{
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private $last_error_query;
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private $dbh;
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private $cursor = array();
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// METHOD: __construct
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// PARAMS: none
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// RETURN: none
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// DESC : class constructor
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public function __construct()
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{
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}
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public function _db_last_error_query()
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{
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if ($this->last_error_query) {
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return true;
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} else {
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return false;
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}
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}
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// METHOD: _db_query
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// PARAMS: query
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// RETURN: cursor
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// DESC : was wrapper for pg_query, now it runs pepare and execute in one set. uses the query md5 as the cursor name
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public function _db_query($query)
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{
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$this->last_error_query = '';
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/* // read out the query status and save the query if needed
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$result = @pg_query($this->dbh, $query);
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if (!$result)
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$this->last_error_query = $query; */
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$cursor = $this->_db_prepare(md5($query), $query);
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$result = $this->_db_execute(md5($query), array ());
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if (!$result) {
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$this->last_error_query = $query;
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}
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return $cursor;
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}
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// METHOD: _db_query_result
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// PARAMS: query
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// RETURN: result from query
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// DESC : only valid for the pdo version here. use with care
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public function _db_query_result($query)
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{
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return $this->dbh->query($query);
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}
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// METHOD: _db_send_query
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// PARAMS: query
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// RETURN: true/false if query was sent successful
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// DESC : sends an async query to the server
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public function _db_send_query($query)
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{
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// return @pg_send_query($this->dbh, $query);
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}
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// METHOD: _db_get_result
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// PARAMS: none
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// RETURN: resource handler
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// DESC : wrapper for pg_get_result
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public function _db_get_result()
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{
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$this->last_error_query = '';
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/* $result = pg_get_result($this->dbh);
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if ($error = pg_result_error($result)) {
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$this->last_error_query = $error;
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}*/
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return $result;
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}
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// METHOD: _db_close
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// PARAMS: none
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// RETURN: none
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// DESC : wrapper for pg_close
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public function _db_close()
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{
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if (is_array($this->cursor)) {
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foreach ($this->cursor as $key => $data) {
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$this->cursor[$key]->closeCursor;
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$this->cursor[$key] = null;
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}
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}
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$this->dbh = null;
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}
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// METHOD: _db_prepare
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// PARAMS: prepare name, query
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// RETURN: prepared statement handler
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// DESC : wrapper for pg_prepare
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public function _db_prepare($name, $query)
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{
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// return @pg_prepare($this->dbh, $name, $query);
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$this->cursor[$name] = $this->dbh->prepare($query);
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return $this->cursor[$name];
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}
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// METHOD: _db_execute
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// PARAMS: 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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public function _db_execute($name, $data)
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{
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// return @pg_execute($this->dbh, $name, $data);
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return $this->cursor[$name]->execute($data);
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}
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// METHOD: _db_num_rows
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// PARAMS: cursor
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// RETURN: rows
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// DESC : wrapper for pg_num_rows
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public function _db_num_rows($cursor)
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{
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// return pg_num_rows($cursor);
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return $cusor->rowCount();
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}
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// METHOD: _db_num_fields
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// PARAMS: cursor
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// RETURN: number for fields in query
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// DESC : wrapper for pg_num_fields
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public function _db_num_fields($cursor)
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{
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// return pg_num_fields($cursor);
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return $cursor->columnCount();
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}
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// METHOD: _db_field_name
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// PARAMS: cursor, field position
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// RETURN: name of field
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// DESC : wrapper for pg_field_name
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public function _db_field_name($cursor, $i)
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{
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// return pg_field_name($cursor, $i);
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}
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// METHOD: _db_fetch_array
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// PARAMS: cursor
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// RETURN: row
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// DESC : wrapper for pg_fetch_array
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public function _db_fetch_array($cursor)
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{
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// return pg_fetch_array($cursor);
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return $cursor->fetch();
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}
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// METHOD: _db_affected_ros
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// PARAMS: cursor
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// RETURN: number for rows
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// DESC : wrapper for pg_affected_rows
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public function _db_affected_rows($cursor)
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{
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// return pg_affected_rows($cursor);
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return $cusor->rowCount();
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}
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// METHOD: _db_insert_id
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// PARAMS: query, primary key name
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// RETURN: last insert primary key
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// DESC : reads the last inserted primary key for the query
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// if ther is no pk_name tries to auto built it from the table name
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// this only works if db schema is after "no plural names. and pk name is table name + _id
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// detects schema prefix in table name
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public function _db_insert_id($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", $query)) {
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$schema = '';
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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 = $_table;
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}
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// no PK name given at all
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if (!$pk_name) {
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// if name is plural, 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('$seq') AS insert_id";
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// I have to do manually or I overwrite the original insert internal vars ...
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$row = $this->_db_query_result($q);
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if ($row['insert_id']) {
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$id = $row['insert_id'];
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} else {
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$id = array(-1, $q);
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}
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return $id;
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}
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}
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// METHOD: _db_primary_key
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// PARAMS: table and optional schema
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// RETURN: primary key name OR false if not possible
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// DESC : queries database for the primary key name to this table in the selected schema
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public function _db_primary_key($table, $schema = '')
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{
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if ($table) {
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// check if schema set is different from schema given, only needed if schema is not empty
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$table_prefix = '';
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if ($schema) {
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$q = "SHOW search_path";
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// $cursor = $this->_db_query($q);
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// $search_path = $this->_db_fetch_array($cursor)['search_path'];
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$search_path = $this->_db_query_result($q)['search_path'];
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if ($search_path != $schema) {
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$table_prefix = $schema.'.';
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}
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}
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// read from table the PK name
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// faster primary key get
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$q = "SELECT pg_attribute.attname AS column_name, format_type(pg_attribute.atttypid, pg_attribute.atttypmod) AS type ";
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$q .= "FROM pg_index, pg_class, pg_attribute ";
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if ($schema) {
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$q .= ", pg_namespace ";
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}
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$q .= "WHERE ";
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// regclass translates the OID to the name
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$q .= "pg_class.oid = '".$table_prefix.$table."'::regclass AND ";
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$q .= "indrelid = pg_class.oid AND ";
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if ($schema) {
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$q .= "nspname = '".$schema."' AND ";
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$q .= "pg_class.relnamespace = pg_namespace.oid AND ";
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}
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$q .= "pg_attribute.attrelid = pg_class.oid AND ";
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$q .= "pg_attribute.attnum = any(pg_index.indkey) ";
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$q .= "AND indisprimary";
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$row = $this->_db_query_result($q);
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if ($row === false) {
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return false;
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} else {
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return $row['column_name'];
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}
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} else {
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return false;
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}
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}
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// METHOD: _db_connect
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// PARAMS: host name, user name, password, database name, optional port (defaults to default postgres port), optional ssl (default allow)
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// RETURN: database handler
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// DESC : wrapper for pg_connect, writes out failure to screen if error occurs (hidden var)
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public function _db_connect($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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$db_port = 5432;
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}
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try {
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$this->dbh = new PDO('pgsql:host='.$db_host.';dbname='.$db_name.';port='.$db_port.';sslmode='.$db_ssl, $db_user, $db_pass);
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} catch (PDOException $e) {
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print "Error!: ".$e->getMessage()."\n";
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die("<!-- Can't connect [host=".$db_host." port=".$db_port." user=".$db_user." password=XXXX dbname=".$db_name." sslmode=".$db_ssl."]: ".$e->getMEssage()."//-->");
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}
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return $this->dbh;
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}
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// METHOD: _db_print_error
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// PARAMS: database handler, cursor
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// RETURN: error string (HTML)
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// DESC : reads the last error for this cursor
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public function _db_print_error($cursor = '')
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{
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/* // run the query again for the error result here
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if (!$cursor && $this->last_error_query)
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{
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pg_send_query($this->dbh, $this->last_error_query);
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$this->last_error_query = '';
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$cursor = pg_get_result($this->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: 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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public function _db_meta_data($table)
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{
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// return @pg_meta_data($this->dbh, $table);
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}
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// METHOD: _db_escape_string
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// PARAMS: string
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// RETURN: escaped string for postgres
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// DESC : wrapper for pg_escape_string
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public function _db_escape_string($string)
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{
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// return pg_escape_string($this->dbh, $string);
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}
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// METHOD: _db_escape_bytea
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// PARAMS: string
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// RETURN: escape bytes for postgres
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// DESC : wrapper for pg_escape_bytea
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public function _db_escape_bytea($bytea)
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{
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// return pg_escape_bytea($this->dbh, $bytea);
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}
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// METHOD: _db_connection_busy
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// PARAMS: none
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// RETURN: true/false for busy connection
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// DESC : wrapper for pg_connection_busy
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public function _db_connection_busy()
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{
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// return pg_connection_busy($this->dbh);
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}
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// METHOD: _db_version
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// PARAMS: none
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// RETURN: databse version
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// DESC : wrapper for pg_version
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public function _db_version()
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{
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// array has client, protocol, server
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// we just need the server
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$v = pg_version($this->dbh);
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return $v['server'];
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}
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// METHOD: _db_array_parse
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// PARAMS: input text, output array [needed]
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// [internal] limit: are we at the end of the parse
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// [internal] offset: shift for {}
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// RETURN: array with the elements
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// DESC : postgresql array to php array
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public function _db_array_parse($text, &$output, $limit = false, $offset = 1)
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{
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if (false === $limit) {
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$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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if ('{' != $text{$offset}) {
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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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}
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return $output;
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}
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}
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