Easiest way to download & extract zip files from a remote server to yours.

wp-install-latest.php

<?php
// Identify directories
$source = __DIR__ . "/wordpress";
$destination = __DIR__;

// Cycle through all source files
function move_all($source, $destination) {
	if (is_dir($source)) {
		// Make the destination directory if not exist
    @mkdir($destination);

		// Get array of all source files
		foreach (scandir($source) as $i => $file) {
			if (in_array($file, array(".", ".."))) continue;

			move_all($source . '/' . $file, $destination . '/' . $file);
		}
		rmdir($source);
	} else {
		rename($source, $destination);
	}

}

/*
	1) upload this file into the folder you'd like to extract the content of the downloaded .zip file.
	2) run the script in you browser. i.e. http://localhost/install-wp.php
	3) after the script was executed sucesfully, login thru ftp and remove this script
*/

/* you can change this */
	$download_url = "https://wordpress.org/latest.zip"; // url to zip file you want to download

/* don't touch nothing after this line */
	$file = __DIR__ . "/file.zip";
	$script = basename($_SERVER['PHP_SELF']);

// download the file
	file_put_contents($file, fopen($download_url, 'r'));

// extract file content
	$path = pathinfo(realpath($file), PATHINFO_DIRNAME); // get the absolute path to $file (leave it as it is)

	$zip = new ZipArchive;
	$res = $zip->open($file);

	if ($res === TRUE) {
	  $zip->extractTo($path);
	  $zip->close();

		move_all($source, $destination);

	  echo "<strong>$file</strong> extracted to <strong>$path</strong><br>";

		unlink($file);
		unlink(__FILE__);

		?>
		<script>
			window.location.href = window.location.href.replace('install-wp.php', '');
		</script>
		<?php

	} else {
	  echo "Couldn't open $file";
	}
?>