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June 9, 2011 14:16
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db.php
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<?php | |
/* | |
Sistema: Sistema | |
Finalidade: Classe para conexão com o banco de dados (postgresql ou mysql). | |
Autor: Wanderson Ferreira Dias | |
Observacao: | |
Alteracoes: | |
Nro Data Autor - Alteracao | |
--- -------- ------------------------------------------------------------------- | |
001 20.05.06 Wanderson - 1º versão do programa | |
*/ | |
class db { | |
var $host = "localhost"; | |
var $banco; | |
var $usuario = 'usuariobanco'; | |
var $senha = 'senhabanco'; | |
var $r = array(); | |
var $id_conectar = false; | |
var $id_query = false; | |
var $erro=false; | |
var $sgbd = 'mysql'; // tipo do banco: postgresql ou mysql | |
var $posicao = 0; | |
function db($banco,$sgbd='') { | |
$this->banco = $banco; | |
if ($sgbd) $this->sgbd = $sgbd; | |
} | |
function erro($msg='') { | |
if ($msg) { | |
$aux = addslashes(trim(str_replace("\n","",$msg))); | |
$this->erro = $msg; | |
} | |
return $this->erro; | |
} | |
function conectar() { | |
if ($this->sgbd=='mysql') { | |
$this->id_conectar = mysql_connect($this->host, $this->usuario, $this->senha, true) or die ('erro'); | |
@mysql_select_db($this->banco); | |
} else if ($this->sgbd=='postgresql') { | |
if (!$GLOBALS['tty']) $GLOBALS['tty']=1; | |
else $GLOBALS['tty']++; | |
$aux = 'host='.$this->host.' dbname='.$this->banco; | |
if ($this->usuario) $aux.=' user='.$this->usuario; | |
if ($this->senha) $aux.=' password='.$this->senha; | |
$aux.=' tty='.$GLOBALS['tty']; | |
$this->id_conectar = @pg_connect($aux); | |
} | |
if (!$this->id_conectar) { | |
echo 'Erro ao conectar ao banco de dados'; | |
exit; | |
} | |
} | |
function exec($sql) { | |
if (!$this->id_conectar) $this->conectar(); | |
if ($this->sgbd=='mysql') { | |
$this->id_query = @mysql_query($sql); | |
$this->erro(@mysql_error($this->id_conectar)); | |
} else if ($this->sgbd=='postgresql') { | |
$this->posicao = 0; | |
$this->id_query = @pg_query($this->id_conectar,$sql); | |
$this->erro(@pg_last_error($this->id_conectar)); | |
} | |
return $this->erro; | |
} | |
function fetch($type='A') { | |
if ($this->sgbd=='mysql') { | |
$result_types = array('A'=>MYSQL_ASSOC,'N'=>MYSQL_NUM,'B'=>MYSQL_BOTH,'a'=>MYSQL_ASSOC,'n'=>MYSQL_NUM,'b'=>MYSQL_BOTH); | |
$this->r = @mysql_fetch_array($this->id_query,$result_types[$type]); | |
} else if ($this->sgbd=='postgresql') { | |
if ($this->posicao>$this->numrows()) { | |
$this->r = array(); | |
return false; | |
} | |
$result_types = array('A'=>PGSQL_ASSOC,'N'=>PGSQL_NUM,'B'=>PGSQL_BOTH,'a'=>PGSQL_ASSOC,'n'=>PGSQL_NUM,'b'=>PGSQL_BOTH); | |
$this->r = @pg_fetch_array($this->id_query,$this->posicao,$result_types[$type]); | |
$this->posicao++; | |
} | |
if ($this->r) return true; | |
else return false; | |
} | |
function numrows() { | |
if ($this->sgbd=='mysql') return @mysql_num_rows($this->id_query); | |
else if ($this->sgbd=='postgresql') return @pg_num_rows($this->id_query); | |
} | |
function begin() { | |
$this->erro = false; | |
return $this->exec("BEGIN"); | |
} | |
function commit() { | |
$this->erro = false; | |
return $this->exec("COMMIT"); | |
} | |
function rollback() { | |
$this->erro = false; | |
return $this->exec("ROLLBACK"); | |
} | |
function end() { | |
$this->erro = false; | |
return $this->exec("ROLLBACK"); | |
} | |
function free_result() { | |
if ($this->sgbd=='mysql') return @mysql_free_result($this->id_query); | |
else if ($this->sgbd=='postgresql') return @pg_free_result($this->id_query); | |
} | |
function registros_afetados() { | |
if ($this->sgbd=='mysql') return @mysql_affected_rows($this->id_conectar); | |
else if ($this->sgbd=='postgresql') return @pg_affected_rows($this->id_query); | |
} | |
} | |
?> |
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