$sql = ("UPDATE eroddondon SET title='".$_POST["title"]."', content='".$_POST["content"]."' WHERE id=1");
$res = mysql_query($sql, $link);
if($res) {
...$data_nested = array('first_key' => 'first', 'second_key' => 'second');
$data = array();
$data['single'] = 'single value';
$data['nested'] = $data_nested;
echo $data['nested']['second_key']; // secondecho json_encode($data);
<?php foreach ($все_доступные as $p_m) : ?>
<?php
$cheked = '';
foreach ($все_чекнутые as $p_m_s) {
if($p_m_s['id'] == $p_m['id']) {
$cheked = 'checked';
break;
}
}
?>
<input type="checkbox" name="payment_method[]" value="<?php echo $p_m['id']; ?>" <?php echo $cheked;?> /><?php echo $p_m['name']; ?><br>
<?php endforeach; ?>