ctrlpanel/public/install/functions.php

<?php 


$required_extentions=array("openssl","gd","mysql","PDO","mbstring","tokenizer","bcmath","xml","curl","zip","fpm");

$requirements = [
	"php"=> "7.4",
	"mysql"=>"5.7.22",


];

function checkPhpVersion(){
	global $requirements;
	if (version_compare(phpversion(), $requirements["php"], '>=')){
		return "OK";
	}
	return "not OK";
}

function getMySQLVersion() { 
	global $requirements;

  $output = shell_exec('mysql -V'); 
  preg_match('@[0-9]+\.[0-9]+\.[0-9]+@', $output, $version); 

  $versionoutput = $version[0] ?? "0";

  return (intval($versionoutput) > intval($requirements["mysql"]) ? "OK":$versionoutput);; 
}

function getZipVersion() { 
	global $requirements;

  $output = shell_exec('zip  -v'); 
  preg_match('@[0-9]+\.[0-9]+\.[0-9]+@', $output, $version); 

  $versionoutput = $version[0] ?? 0;

  return ($versionoutput!=0 ? "OK":"not OK");; 
}

function getGitVersion() { 
	global $requirements;

  $output = shell_exec('git  --version'); 
  preg_match('@[0-9]+\.[0-9]+\.[0-9]+@', $output, $version); 

  $versionoutput = $version[0] ?? 0;

  return ($versionoutput!=0 ? "OK":"not OK");; 
}

function getTarVersion() { 
	global $requirements;

  $output = shell_exec('tar  --version'); 
  preg_match('@[0-9]+\.[0-9]+@', $output, $version); 

  $versionoutput = $version[0] ?? 0;

  return ($versionoutput!=0 ? "OK":"not OK");; 
}

function checkExtensions(){
	global $required_extentions;

	$not_ok = [];
	$extentions = get_loaded_extensions();

	foreach($required_extentions as $ext){
		if(!in_array($ext,$extentions)){
			array_push($not_ok,$ext);
		}
	}
	return $not_ok;

}

    function setEnvironmentValue($envKey, $envValue)
    {

        $envFile = dirname(__FILE__,3)."/.env";
        $str = file_get_contents($envFile);

        $str .= "\n"; // In case the searched variable is in the last line without \n
        $keyPosition = strpos($str, "{$envKey}=");
        $endOfLinePosition = strpos($str, PHP_EOL, $keyPosition);
        $oldLine = substr($str, $keyPosition, $endOfLinePosition - $keyPosition);
        $str = str_replace($oldLine, "{$envKey}={$envValue}", $str);
        $str = substr($str, 0, -1);

        $fp = fopen($envFile, 'w');
        fwrite($fp, $str);
        fclose($fp);
    }



?>