Geração de códigos captcha em formulários HTML com PHP e PostgreSQL
Publicado por Cláudio Souza Jr. (última atualização em 06/01/2015)
[ Hits: 4.976 ]
Requerimentos:
- PostgreSQL 9.2
- Apache 2
- PHP 5 (5.4.35)
- NTP (facultativo)
- Extensões PHP: php5-gd e php5-pgsql
- A opção global "date.timezone" do "php.ini" foi configurada
- O navegador tem que suportar JavaScript.
Segue anexada a classe e os códigos dos demais arquivos.
Obs.: o path aqui no meu servidor é: "http://localhost/testes/php/classes_php/captcha_simples". Ao mudar isso, atente para o modo "3" do método "CriaCaptcha", em "classe.php".
Críticas construtivas, sugestões e análises são bem-vindas.
::: Código do arquivo index.php :::
<?php
include 'classe.php';
$Captcha = new Captcha();
$Captcha->Definicao(); ?>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8"/>
<title>Teste Captcha Simples</title>
<link rel='icon' type='image/png' href=''>
<link rel='stylesheet' href='style.css' type='text/css'>
</head>
<body onload="<?=$Captcha->body_onload?>" onunload="<?=$Captcha->body_onunload?>">
<div class="corpo">
<?php
if($Captcha->passo == '1') {
$Captcha->FormCaptcha($Captcha->passo, $Captcha->captcha_id, $Captcha->captcha_cod);
}
elseif($Captcha->passo == '2') {
$Captcha->CriaCaptcha('1', $Captcha->captcha_id, $Captcha->captcha_cod);
}?>
</div>
<script type="text/javascript" src="javascript.js"></script>
</body>
</html>
--------------------------------------------------------------------------------------
::: Código do arquivo captcha.php :::
<?php
header("Content-type: image/png");
include_once 'classe.php';
$captcha = new Captcha();
$captcha->CriaImgCaptcha($_SESSION['captcha_cod']);
?>
--------------------------------------------------------------------------------------
::: Código do arquivo style.css:::
.corpo {
margin-left: 120px;
margin-right: 120px;
margin-top: 120px;
padding-left: 120px;
padding-right: 120px;
}
.input-text {
border: solid 1px;
border-color: #2f96b4;
padding: 2px;
text-transform: uppercase;
}
--------------------------------------------------------------------------------------
::: Código do arquivo javascript.js:::
/**
* Script de validacao e funcoes genericas
*/
function RefreshThisPage(){
window.location = window.location;
}
function SetFormData(){
sessionStorage["captcha_cod"] = document.FormCaptcha.captcha_cod.value;
sessionStorage["form_texto"] = document.FormCaptcha.form_texto.value;
}
function LoadFormData(){
var captcha_cod = sessionStorage.captcha_cod;
var form_texto = sessionStorage.form_texto;
if (captcha_cod != undefined ||form_texto != undefined){
document.FormCaptcha.captcha_cod.value = captcha_cod;
document.FormCaptcha.form_texto.value = form_texto;
}
}
function UnsetFormData(){
sessionStorage.removeItem('captcha_cod');
sessionStorage.removeItem('form_texto');
}
function ValidaForm(){
if(document.FormCaptcha.form_texto.value === ""){
alert('Informe o texto!');
document.getElementById('form_texto').focus();
return false;
}
if(document.FormCaptcha.captcha_cod.value === ""){
alert('Informe o codigo captcha!');
document.getElementById('captcha_cod').focus();
return false;
}
if(document.FormCaptcha.captcha_cod.value.length < '6'){
alert('O codigo captcha possui 6 digitos!');
document.getElementById('captcha_cod').focus();
return false;
}
return true;
}
--------------------------------------------------------------------------------------
::: Tabela do banco de dados :::
DROP TABLE IF EXISTS tb_captcha CASCADE;
CREATE TABLE tb_captcha
(
captcha_id integer NOT NULL, -- Id do registro dos dados do sistema
captcha_cod character varying, -- Código captcha
captcha_data date, -- Data de alteração
CONSTRAINT captcha_id PRIMARY KEY (captcha_id)
)
WITH (OIDS=FALSE);
COMMENT ON TABLE tb_captcha IS 'Dados do sistema, informações gerais';
COMMENT ON COLUMN tb_captcha.captcha_id IS 'Id do registro dos dados do sistema';
COMMENT ON COLUMN tb_captcha.captcha_cod IS 'Código captcha';
COMMENT ON COLUMN tb_captcha.captcha_data IS 'Data de alteração';
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (1, '0880A2', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (2, 'A7D3E4', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (3, '765C4B', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (4, '2B7C80', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (5, '323FD0', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (6, '967F69', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (7, 'A79653', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (8, 'FE42A3', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (9, 'D2A67C', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (10, 'C27EC0', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (11, '304C6B', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (12, '823F10', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (13, 'DA599E', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (14, '1199D9', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (15, 'DDE76B', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (16, '4D7BA5', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (17, '749E4E', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (18, 'DBB6E9', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (19, '69380A', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (20, 'D5A082', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (21, '4403DC', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (22, '73570A', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (23, '61E5B0', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (24, '6FCE3C', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (25, '8AC22D', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (26, 'C4DBA5', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (27, '47DBD6', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (28, 'C50453', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (29, '484B1F', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (30, 'DEB59D', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (31, 'DC3EA6', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (32, 'BA46E1', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (33, 'A335E1', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (34, 'F39EF0', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (35, '3923B9', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (36, '2D794C', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (37, '991AA2', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (38, 'F4F648', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (39, 'AE5E8F', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (40, '811C71', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (41, '002C60', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (42, '7D7CC3', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (43, '3A480A', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (44, '979E0F', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (45, '5D7379', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (46, '2D7E9D', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (47, '075FB7', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (48, 'C3F1D7', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (49, 'CC9C8A', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (50, '24086C', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (51, 'C8CDC8', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (52, '072CCE', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (53, '285DE3', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (54, '0B9586', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (55, 'AC47E0', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (56, '59B8BD', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (57, '4CE688', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (58, 'CBABA3', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (59, '363435', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (60, '55717A', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (61, '60199D', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (62, 'BAF01B', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (63, 'AFE56E', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (64, '11E096', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (65, '717695', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (66, 'F01062', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (67, '18DC86', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (68, '63420D', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (69, '94F9F5', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (70, '04893A', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (71, '02F6C3', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (72, '2B906C', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (73, 'E553B6', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (74, '8ECF62', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (75, 'C77C40', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (76, 'B2C017', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (77, '10C9E4', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (78, '0FCE1B', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (79, 'E7A71E', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (80, '18FD78', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (81, '77C4F3', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (82, '3CEA7C', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (83, '9D5611', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (84, 'BD7D5F', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (85, 'D2A9E3', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (86, 'FDF115', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (87, '12C1FB', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (88, '0BBFCF', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (89, 'F45DBE', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (90, '5A2EE5', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (91, '62CA57', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (92, '1B6F5B', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (93, '8B2C7D', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (94, '1CD166', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (95, '130DEF', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (96, '91ED08', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (97, 'C3807D', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (98, 'E3599F', '2014-12-31');
INSERT INTO tb_captcha (captcha_id, captcha_cod, captcha_data) VALUES (99, 'A9BFBB', '2014-12-31');
Scripts recomendados
Url Amigavel ( como nunca vi na net )
Paginação com qualidade em PHP
Comentários
Nenhum comentário foi encontrado.
Patrocínio
Site hospedado pelo provedor RedeHost.
Destaques
Artigos
Modo Simples de Baixar e Usar o bash-completion
Monitorando o Preço do Bitcoin ou sua Cripto Favorita em Tempo Real com um Widget Flutuante
Dicas
Adicionar botão "mostrar área de trabalho" no Zorin OS
Como montar um servidor de backup no linux
Trazendo de volta o Serviços em Segundo Plano no Plasma6
Tópicos
É normal não gostar de KDE? (21)
Servidor para arquivos e banco de dados (4)
780 mil usuários do Janelas baIxaram Linux em um mês (4)
Atualizei meu ubuntu e desliguei e ele não inicia corretamente (12)
Top 10 do mês
-
Xerxes
1° lugar - 115.089 pts -
Fábio Berbert de Paula
2° lugar - 76.713 pts -
Mauricio Ferrari
3° lugar - 24.213 pts -
edps
4° lugar - 21.954 pts -
Alberto Federman Neto.
5° lugar - 21.883 pts -
Daniel Lara Souza
6° lugar - 20.410 pts -
Andre (pinduvoz)
7° lugar - 20.414 pts -
Buckminster
8° lugar - 20.142 pts -
Alessandro de Oliveira Faria (A.K.A. CABELO)
9° lugar - 19.518 pts -
Diego Mendes Rodrigues
10° lugar - 15.797 pts
Scripts
A maior comunidade GNU/Linux da América Latina! Artigos, dicas, tutoriais, fórum, scripts e muito mais. Ideal para quem busca auto-ajuda.
Site hospedado por:
