PHP: How to take exception from the model in the controller

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I created a class to connect to LDAP, in one of the methods I did the following:

// Classe Ldap()
public function ldapConnection() {

    $this->_ldapCon = ldap_connect($this->_ldapServer);

    if ($this->_ldapCon) {

        ldap_set_option($this->_ldapCon, LDAP_OPT_PROTOCOL_VERSION, 3);

        ldap_set_option($this->_ldapCon, LDAP_OPT_REFERRALS, 0);

        return $this->_ldapCon;

    } else {

        throw new Exception('Não foi possível conectar ao servidor LDAP');

    }

}

If I do 

$conexao = new Ldap();

try {

    $conexao->ldapConnection();

} catch (Exception $ex) {

    // Abaixo, não pega a exceção que eu lancei no método. A exceção lançada no método aparece como "Fatal error: Uncaught exception 'Exception' with message: Não foi possível conectar ao servidor LDAP"
    echo json_encode(array('message' => $ex->getMessage()));

}

How do I get the exact exception thrown by the LDAP class method and not just a generic exception?

php exception

  • Not if you have anything standard you should create your custom Exception class and then capture in catch.

  • But the blocks try/catch will only evaluate the exception thrown by the method within them? Or another exception may be cast, beyond that which I myself define?

  • 1

    The block try/catch given should be capturing the exception. The class Ldap is part of some namespace?

  • Yes. It’s part of namespace Models

2 answers

2


First, if the Ldap class is present within some namespace, for you to shoot and/or capture the Exception, you need to put it in the global namespace, that is, shoot and capture using \Exception.

To take a specific Exception by the LDAP class, you first have to create your own Exception class, for example:

class LdapException extends \Exception{}

So in your method Ldap::ldapConnection() you put:

// Classe Ldap()
public function ldapConnection() {

    $this->_ldapCon = ldap_connect($this->_ldapServer);

    if ($this->_ldapCon) {
        ldap_set_option($this->_ldapCon, LDAP_OPT_PROTOCOL_VERSION, 3);

        ldap_set_option($this->_ldapCon, LDAP_OPT_REFERRALS, 0);

        return $this->_ldapCon;
    } else {
        throw new LdapException('Não foi possível conectar ao servidor LDAP');
    }
}

And to capture: 

$conexao = new Ldap();

try {
    $conexao->ldapConnection();
} catch (LdapException $ex) {
    echo json_encode(array('message' => $ex->getMessage()));
}

0

I used the idea of @Lucasmendes and got the following result:

I created the class of exceptions extending the class \Exception, but I had to make a modification: add the builders.

namespace Models;

class AppExceptions extends \Exception
{
    public function __construct($message, $code = 0, \Exception $previous = null)
    {
        parent::__construct($message, $code, $previous);
    }
}

Then in the ldap class():

protected function conexaoLdap()
{
    $this->_conexao = ldap_connect($this->servidor_ldap);
    if ($this->_conexao) {
        ldap_set_option($this->_conexao, LDAP_OPT_PROTOCOL_VERSION, 3);
        ldap_set_option($this->_conexao, LDAP_OPT_REFERRALS, 0);
        return $this->_conexao;
    } else {
        throw new AppExceptions('Não foi possível se conectar ao servidor LDAP');
    }
}

Taking the exception:

try {
    // Code goes here
} catch (AppExceptions $e) {
    echo $e->getMessage();
}
  • 1

    Why did you have to add the builder when in the same you made the direct call to the parent-class builder? If you don’t have too much logic, you don’t need to overwrite the method.

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