i'm just making experience on some PHP functions to control some form fields.
I just built a real tiny form to see how can work an OOP form, but i'm experiencing a strange behaviour of strlen command.
Here is the code:
class form and its tiny control
class Form {
public $nome = '';
public function __construct() {
if(isset($_POST['nome'])){
$this->nome = $_POST['nome'];
}
}
public function body() {
return "<form action=$_SERVER[PHP_SELF] method=post>
<input type=text name=nome value=\"$this->nome\">
<input type=submit value=INVIA><br>";
}
}
class check {
public $nome;
public function __construct() {
$this->nome = $_POST['nome'];
}
public function controllo() {
if ( !empty($this->nome) && strlen($this->nome >= 3) ) {
echo "$this->nome è un nome valido";
return TRUE;
} else {
return FALSE;
}
}
}
PHP implementation
<?php
require '/classes/class.form';
if(!isset($_POST['nome'])) {
$form=new Form();
echo $form->body();
} else {
$check = new check();
if (!$check->controllo()) {
$form2=new Form();
echo $form2->body();
echo "c'è un errore nei controlli";
} else {
echo "tutto ok!";
}
}
?>
As you see, the check should control if the input text lenght is >=3. If false, the form print out again with the content and with an advise that something is wrong, else it says it's correct.
It happens that if I try with "1" and "2", the control does not make it pass, but when i try with "3", it seems that the script does not match the lenght of the input but its type and it gives me a correct match even if the lenght is a single char.
Moreover, if i try a single alphabetical or a number >3 of alphabetical chars, the control is always false. What can be the problem here?
