Recording variables in the database and how to retrieve them and assign value

Question

Recording variables in the database and how to retrieve them and assign value

Asked 8 years, 8 months ago

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I need to write a contract in HTML format in the database. This contract will have the personal data of the people. This personal data will come from a database query. I need to dynamically fill in this data.

Format Saved to Database

<html>
....
Nome: $nome
.....
</html>

<?php
$contrato = $contratobanco;
echo $contrato;
?>

I need to fill out this $name field. How to write this reference in the database then retrieve them to correctly assign in the $contract variable with the completed person’s name coming from a BD query ?

2 answers

3

Since you didn’t mention where the variables come from, I’ll give you a general example of a system of templates:

Information from the DB:

<html>
    Nome: $nome$
</html>

PHP

<?php
    $contrato = /* aqui você pega do DB os dados */;
    $nome = 'José Maria'.
    $idade = '17';

    $contrato = str_replace( '$nome$', $nome, $contrato ); 
    $contrato = str_replace( '$idade$', $idade , $contrato ); 
    ... faça o mesmo para todos os campos ...

    echo $contrato;
?>

Note that in DB it pays to use a marking that does not confuse, as $nome$ instead of $nome, to avoid ambiguity if there is something like $nomenclatura (that begins with $nome also).

If you already have a lot in DB, at least be careful, with words started in the same way, change the longer ones first in the sequence of places (change the $nomenclatura before $nome, other than the $nome will touch something that should not).

See the syntax of str_replace using array to make several replacements at once:

    $contrato = str_replace(
       array( '$nome$', '$idade$', '$endereco$' ), // Palavras a trocar
       array(  $nome  ,  $idade  , $endereco    ), // O que vai por no lugar de cada uma
       $contrato
    )

The following question may also help:
How to create a function to scroll through a dynamically created PHP page and change certain text

That’s right. Thank you very much!

– lelopes

2016/03/06 at 23:59

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by David Concha • **539** points · Answer 1 · 2016-03-06T20:16:32+00:00

To enter data into the database create a form with the necessary inputs. In the action of this form point to a file called insere.php.

formulario.html

<form action="insere.php" method="post">
Nome:<br>
<input type="text" name="nome"><br>
Contrato:<br>
<input type="text" name="contrato">
</form>

insere.php

<?php
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "myDB";

//PEGAR OS VALORES DO FORMULARIO
$nome=$_REQUEST['nome']; /*Aqui o nome é o `name="nome"` que vem do   formulario via POST.*/
$contrato=$_REQUEST['contrato'];//A mesma coisa

// Create connection
$conn = new mysqli($servername, $username, $password, $dbname);
// Check connection
if ($conn->connect_error) {
die("Connection failed: " . $conn->connect_error);
} 

$sql = "INSERT INTO info (nome, contrato)
VALUES ('$nome', '$contrato')";

if ($conn->query($sql) === TRUE) {
echo "New record created successfully";
} else {
echo "Error: " . $sql . "<br>" . $conn->error;
}

$conn->close();
?>

Ready has been added in your comic book.

Now let’s create the mostra.php where it will display the data that exist in your table info.

mostra.php

<?php
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "myDB";

// Create connection
$conn = new mysqli($servername, $username, $password, $dbname);
// Check connection
if ($conn->connect_error) {
die("Connection failed: " . $conn->connect_error);
} 

$sql = "SELECT nome, contrato FROM info";
$result = $conn->query($sql);

if ($result->num_rows > 0) {
// output data of each row
while($row = $result->fetch_assoc()) {
//MOSTRA O RESULTADO
    echo "nome: " . $row["nome"]. " - Contrato: " . $row["contrato"]. "<br>";
}
} else {
echo "0 results";
}
$conn->close();
?>

Okay, I hope this helped. For more information on INSERT and the SELECT, please consult:

http://www.w3schools.com/php/php_mysql_insert.asp http://www.w3schools.com/php/php_mysql_select.asp

*Configure the database username/password/name as well as the name of your table