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<?PHP // -*-Mode: C++;-*- |
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/* |
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Joseph Artsimovich (joseph_a<at>mail<dot>ru) |
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DBD::Pg -- The PostgreSQL Driver. |
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See: http://evil.inetarena.com/php/DBI.php for more info. |
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Licence: LGPL (http://www.gnu.org/). |
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This software is provided "AS IS" with no warrenty either implicit, |
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explicit or otherwise. Use at your own risk. |
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Notes: |
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o insert_id is not implemented |
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*/ |
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class DBD_Pg { |
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var $is_persisent; |
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var $DBI; |
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var $exit_on_fail = 0; |
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var $dbh; |
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function DBD_connect( $db_name, $db_host = '', |
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$db_user = '', $db_passwd = '', |
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$is_persistent = 0){ |
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//Track the $is_persistant just for fun... |
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$is_persistent = $is_persistent ? $is_persistent : 0; |
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$this->is_persistent = $is_persistent; |
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//DEBUG... |
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//echo "DBD::Pg: [$db_name][$db_host][$db_user][$is_persistent]<br>\n"; |
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$str = ''; |
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if ($db_host) $str .= "host=$db_host "; |
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if ($db_name) $str .= "dbname=$db_name "; |
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if ($db_user) $str .= "user=$db_user "; |
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if ($db_passwd) $str .= "password=$db_passwd "; |
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$str = chop($str); |
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if( $is_persistent ){ |
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$conn = pg_pconnect( $str ); |
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} else { |
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$conn = pg_connect( $str ); |
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} |
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if( !$conn ){ |
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$this->errstr = "DBD::Pg Error: Could not connect to the database."; |
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return; |
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} |
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$this->dbh = $conn; |
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return( $this ); |
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}//end connect function |
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function disconnect( ){ |
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pg_close( $this->dbh ); |
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$this->dbh = undef; |
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return( 1 ); |
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}//end disconnect function |
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function prepare( $query ){ |
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if( ! $this->dbh ){ return; } |
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//Does nothing but save the query... |
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$sth = new STH_Pg; |
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$sth->DBH( $this ); |
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$sth->prepare( $query ); |
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return( $sth ); |
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}//end dbh prepare fn |
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//do is a reserved word so I have to name this something else. |
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function dbh_do( $query ){ |
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//run the query and return the number of affected rows. |
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$result = pg_exec( $this->dbh, $query ); |
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if( ! $result ){ |
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$this->errstr = "DBI Error: 'dbh_do' failed: ". |
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pg_errormessage( $this->dbh ); |
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if( $this->exit_on_fail ){ |
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echo $this->errstr."<br>\n"; |
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$this->disconnect( ); |
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exit( ); } |
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return; |
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} |
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$rows = pg_cmdtuples( $result ); |
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if( $rows == 0 ){ $rows = '0E0'; } |
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return( $rows ); |
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}//end fn do |
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function insert_id( ){ |
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//Get the last serial number from an insert. |
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$this->errstr = "DBI Error: 'insertid' unimplemented."; |
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return( -1 ); |
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}//end fn do |
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function quote( $string ){ |
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if( $string ){ |
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return( "'".addslashes( $string )."'" ); |
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} else { |
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return( 'NULL' ); |
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} |
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}//end fn quote |
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}//end DBI class |
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//=========================================================== |
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class STH_Pg { |
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var $query; |
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var $DBH; |
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var $dbh; |
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var $result; |
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var $row = 0; |
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function STH( $dbh = '' ){ |
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if( $dbh ){ |
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$this->dbh = $dbh; |
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} |
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return( $this ); |
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} |
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function DBH( $dbh ){ |
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$this->DBH = $dbh; //watch out, this copies the object not the reference. |
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$this->dbh = $dbh->dbh; |
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return( $dbh ); |
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} |
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function prepare( $query ){ |
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if( ! $this->dbh ){ return; } |
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$this->query = $query; |
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return( $query ); |
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} |
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function execute( ){ |
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if( ! $this->dbh ){ return; } |
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//echo "Running query $this->query<br>\n"; |
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$this->result = pg_exec( $this->dbh, $this->query ); |
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if( ! $this->result ){ |
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$this->errstr = "STH Execute failed: ".pg_errormessage( $this->dbh ); |
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return; |
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} |
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return( 1 ); |
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}//end execute fn |
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function finish( ){ |
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if( ! $this->result ){ return; } |
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pg_freeresult( $this->result ); |
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$this->result = undef; |
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return( 1 ); |
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}//end execute fn |
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function rows( ){ |
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return( pg_numrows( $this->result ) ); |
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} //end rows fn |
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function fetchrow_array( ){ |
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if( ! $this->result ){ |
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//echo "STH Error: Calling fetchrow on null result.<br>\n"; |
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return; |
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} |
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if ($this->row >= pg_numrows($this->result)) return 0; |
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return( pg_fetch_row( $this->result, $this->row++ )); |
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} |
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function fetchrow_hash( ){ |
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if( ! $this->result ){ |
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//echo "STH Error: Calling fetchrow on null result.<br>\n"; |
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return; |
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} |
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if ($this->row >= pg_numrows($this->result)) return 0; |
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return( pg_fetch_array( $this->result, $this->row++ )); |
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} |
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} |
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$GLOBALS[classDBDPg_read] = 1; |
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