Can't insert data to Database with PHP - php

Question

Can't make basic things. The connection to database is good, cause it shows list, deletes data lines. Also after submiting, it doesn't show any errors, but it doesn't show in database...I am still a beginner in PHP, I searched thoroughly but I can't find out what's wrong in code
This is my model class:
<?php
class abonimentas {
private $abonimentas_lentele = '';
public function __construct() {
$this->abonimentas_lentele = config::DB_PREFIX . 'abonimentas';
}
public function getAbonimentasListCount() {
$query = " SELECT COUNT(`{$this->abonimentas_lentele}`.`id`) as `kiekis`
FROM `{$this->abonimentas_lentele}`";
$data = mysql::select($query);
return $data[0]['kiekis'];
}
public function getAbonimentas($id) {
$query = " SELECT *
FROM `{$this->abonimentas_lentele}`
WHERE `id`='{$id}'";
$data = mysql::select($query);
return $data[0];
}
public function insertAbonimentas($data) {
$query = " INSERT INTO `abonimentas`
(
`pavadinimas`,
`aprasymas`,
`papildomos_salygos`,
`kaina`
)
VALUES
(
'{$data['pavadinimas']}',
'{$data['aprasymas']}',
'{$data['papildomos_salygos']}'
'{$data['kaina']}'
)";
mysql::query($query);
return mysql::getLastInsertedId();
}
public function updateAbonimentas($data) {
$query = " UPDATE `abonimentas`
SET `pavadinimas`='{$data['pavadinimas']}',
`aprasymas`='{$data['aprasymas']}',
`papildomos_salygos`='{$data['papildomos_salygos']}',
`kaina`='{$data['kaina']}'
WHERE `id`='{$data['id']}'";
mysql::query($query);
}
}
This is creation class:
<?php
include 'libraries/abonimentas.class.php';
$abonimentasObj = new abonimentas();
$formErrors = null;
$data = array();
$required = array('pavadinimas', 'aprasymas', 'papildomos_salygos', 'kaina');
$maxLengths = array (
'pavadinimas' => 40,
'aprasymas' => 200,
'papildomos_salygos' => 200
);
if(!empty($_POST['submit'])) {
// nustatome laukų validatorių tipus
$validations = array (
'pavadinimas' => 'anything',
'aprasymas' => 'anything',
'papildomos_salygos' => 'anything',
'kaina' => 'price');
include 'utils/validator.class.php';
$validator = new validator($validations, $required, $maxLengths);
if($validator->validate($_POST)) {
$dataPrepared = $validator->preparePostFieldsForSQL();
$dataPrepared['id'] = $abonimentasObj->insertAbonimentas($dataPrepared);
$abonimentasObj->updateAbonimentas($dataPrepared);
header("Location: index.php?module={$module}&action=list");
die();
} else {
$formErrors = $validator->getErrorHTML();
$data = $_POST;
}
}
include 'templates/abonimentas_form.tpl.php';
?>
This is template for input:
<ul id="pagePath">
<li>Pradžia</li>
<li>Abonimentai</li>
<li><?php if(!empty($id)) echo "Abonimento redagavimas"; else echo "Naujas abonimentas"; ?></li>
</ul>
<div class="float-clear"></div>
<div id="formContainer">
<?php if($formErrors != null) { ?>
<div class="errorBox">
Neįvesti arba neteisingai įvesti šie laukai:
<?php
echo $formErrors;
?>
</div>
<?php } ?>
<form action="" method="post">
<fieldset>
<legend>Abonimento informacija</legend>
<p>
<label class="field" for="pavadinimas">Pavadinimas<?php echo in_array('pavadinimas', $required) ? '<span> *</span>' : ''; ?></label>
<input type="text" id="pavadinimas" name="pavadinimas" class="textbox textbox-200" value="<?php echo isset($data['pavadinimas']) ? $data['pavadinimas'] : ''; ?>">
<?php if(key_exists('pavadinimas', $maxLengths)) echo "<span class='max-len'>(iki {$maxLengths['pavadinimas']} simb.)</span>"; ?>
</p>
<p>
<label class="field" for="aprasymas">Aprašymas<?php echo in_array('aprasymas', $required) ? '<span> *</span>' : ''; ?></label>
<textarea id="aprasymas" name="aprasymas" class=""><?php echo isset($data['aprasymas']) ? $data['aprasymas'] : ''; ?></textarea>
<?php if(key_exists('aprasymas', $maxLengths)) echo "<span class='max-len'>(iki {$maxLengths['aprasymas']} simb.)</span>"; ?>
</p>
<p>
<label class="field" for="papildomos_salygos">Papildomos sąlygos<?php echo in_array('papildomos_salygos', $required) ? '<span> *</span>' : ''; ?></label>
<textarea id="papildomos_salygos" name="papildomos_salygos" class=""><?php echo isset($data['papildomos_salygos']) ? $data['papildomos_salygos'] : ''; ?></textarea>
<?php if(key_exists('papildomos_salygos', $maxLengths)) echo "<span class='max-len'>(iki {$maxLengths['papildomos_salygos']} simb.)</span>"; ?>
</p>
<p>
<label class="field" for="kaina">Kaina<?php echo in_array('kaina', $required) ? '<span> *</span>' : ''; ?></label>
<input type="number" id="kaina" name="kaina" class=""><?php echo isset($data['kaina']) ? $data['kaina'] : ''; ?></input>
<?php if(key_exists('kaina', $maxLengths)) echo "<span class='max-len'>(iki {$maxLengths['kaina']} simb.)</span>"; ?>
</p>
</fieldset>
<p class="required-note">* pažymėtus laukus užpildyti privaloma</p>
<p>
<input type="submit" class="submit button" name="submit" value="Išsaugoti">
</p>
<?php if(isset($data['id'])) { ?>
<input type="hidden" name="id" value="<?php echo $data['id']; ?>" />
<?php } ?>
</form>
</div>