PHP document::execute_query示例

 <?php 
$page_title = 'Barangay System';
$stylesheet_link = 'style';
require 'path.php';
init_cobalt();
require 'header1.php';
require_once 'subclasses/document.php';
$dbh_document = new document();
$dbh_document->execute_query("SELECT d.document_name, r.requirement_name FROM document d JOIN requirement r ON d.document_id = r.document_id WHERE is_offered='yes'");
$result = $dbh_document->result;
$document_requirements = array();
while ($row = $result->fetch_assoc()) {
    $document_requirements[] = $row;
}
$dbh_document->execute_query("SELECT DISTINCT document_name, document_description FROM document WHERE is_offered='yes'");
$result = $dbh_document->result;
$documents = array();
while ($row = $result->fetch_assoc()) {
    $documents[] = $row;
}
?>
<main>
	<div class="block-body">
			<h1 class="doc-headings">Listahan ng mga Dokumento</h1><br/><br/>
		<div class="div-list-doc">
			<hr class="hr">
			<center>
			<?php 
foreach ($documents as $row) {
    extract($row);
    echo "<ul class='list-of-doc'>";