save.php

<?php
    if (!isset($_SERVER['PHP_AUTH_USER'])) {
        header('WWW-Authenticate: Basic realm="My Realm"');
        header('HTTP/1.0 401 Unauthorized');
        echo 'Text to send if user hits Cancel button';
        exit;
    } else {
        echo "<p>Hello {$_SERVER['PHP_AUTH_USER']}.</p>";
        echo "<p>You entered {$_SERVER['PHP_AUTH_PW']} as your password.</p>";
    }

    $markdown = $_POST['markdown'];
    preg_match_all("/path: \"\/(.*)\/\"/", $markdown, $output_array);
    $dir = date("Y-m-d") . "-" . $output_array[1][0];
    mkdir("../gatsby/pages/" . $dir, 0755);
    $file = fopen("../gatsby/pages/" . $dir . "/index.md","w");

    fwrite($file, $markdown);
    fclose($file);

    $arr = file("../gatsby/pages/" . $dir . "/index.md");
    $arr[0] = trim($arr[0]) . "\n";
    $arr[1] = trim($arr[1]) . "\n";
    $arr[2] = trim($arr[2]) . "\n";
    $arr[3] = trim($arr[3]) . "\n";
    $arr[4] = trim($arr[4]) . "\n";
    $arr[5] = trim($arr[5]) . "\n";
 
    file_put_contents("../gatsby/pages/" . $dir . "/index.md", implode($arr));

    $i = 0;
    foreach($_FILES as $file){
    	$filename = $_FILES["UploadedImage" . $i]["name"];
    	move_uploaded_file($_FILES["UploadedImage" . $i]["tmp_name"], "../gatsby/pages/" . $dir . '/' . $filename);
    	$i++;
	}

	shell_exec('(cd ../gatsby/; gatsby build)');
?>