save_element_template.php
<?php
$pdo = new PDO('mysql:host=localhost;dbname=test','reed','pass_word');
$statement = $pdo->prepare("INSERT INTO wysiwyg_elements(element_html,settings_html) VALUES(:element_html, :settings_html)");
$statement->execute(
[':element_html'=>$_POST['element_html'],
":settings_html"=>$_POST['settings_html'],
]
);
print_r($statement->errorInfo());
?>