How to Ensure ProjeQtOr Cron Process is Always Running

#!/usr/bin/php
<?php

/*
 * Purpose:  Restart the cron process of a single ProjeQtOr application site.
 * Inputs:   None.
 * Outputs:  Prints for logging when a restart is initiated and if it fails.
 * Security: Ensure that this script file is only readable & writeable by root 
 *           and/or the specific Linux user that will be running this script!
 * Version:  1.0.0
 */

/* ----------------------------------
 * ENTER SITE SPECIFIC VARIABLES HERE
 * ----------------------------------
 */

/* Define the site's url with trailing slash (usually https://yourdomain/projeqtor/) */
$siteUrl="https://yourdomain/projeqtor/";

/* Define the ProjeQtOr API's httppass username & password */
$httpUser="{username}";
$httpPass="{password}";

/* Define the maximum time in seconds allowed for the API call.
 * Required because the api call to start the cron process runs indefinitely.
 * Must be long enough to execute at peek loads, but not so long that it disturbs the system's cron.
 */
$maxtime="10";


/* ----------------------
 * DO NOT EDIT BELOW HERE
 * ----------------------
 */


/* Perform an initial check to see if a restart is actually required */
$fullUrl=$siteUrl."api/Cron/check";
$api_response = callapi( $fullUrl, $httpUser, $httpPass, $maxtime );
if ( preg_replace("#{.*:\"(.*)\"}.*#", "$1", $api_response) <> 'running' ) {

	/* The cron process is not running, so attempt to start it */
	echo "Info: Starting ProjeQtOr cron process for ".$siteUrl."\n";
	$fullUrl=$siteUrl."api/Cron/start";
	callapi( $fullUrl, $httpUser, $httpPass, $maxtime );

    /* Perform a final check to see if the restart was successful */
	$fullUrl=$siteUrl."api/Cron/check";
	$api_response = callapi( $fullUrl, $httpUser, $httpPass, $maxtime );
	if ( preg_replace("#{.*:\"(.*)\"}.*#", "$1", $api_response) <> 'running' ) {
		echo "Error: failed to start ProjeQtOr cron process\n";
	}
}

/* ---------
 * Functions
 * ---------
 */

/* Make an API call given:
 *  1) the full api url as a string
 *  2) the http username protecting the api directory as a string
 *  3) the http password protecting the api directory as a string
 *  4) the maximum time in seconds to allow for the call as a string
 * Returns the api's response as a string
 */

function callapi( $url, $user, $pass, $time ) {
    $curl = curl_init($url);
	curl_setopt($curl, CURLOPT_HTTPAUTH, CURLAUTH_BASIC);
	curl_setopt($curl, CURLOPT_USERPWD, $user.":".$pass);
	curl_setopt($curl, CURLOPT_TIMEOUT, $time);
	curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
	curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);
	curl_setopt($curl, CURLOPT_FAILONERROR, true);
	$curl_response = curl_exec($curl);
	curl_close($curl);
	return $curl_response;
}
?>