Add FTP delete basic tests

ext/ftp/tests/ftp_delete_basic.phpt

@@ -0,0 +1,32 @@
+--TEST--
+Testing ftp_delete basic
+--CREDITS--
+Ward Cappelle <[email protected]>
+User Group: PHP-WVL & PHPGent #PHPTestFest
+--SKIPIF--
+<?php
+require 'skipif.inc';
+?>
+--FILE--
+<?php
+require 'server.inc';
+
+$ftp = ftp_connect('127.0.0.1', $port);
+if (!$ftp) die("Couldn't connect to the server");
+ftp_login($ftp, 'user', 'pass');
+
+echo "Test case #1: removal of existing file from FTP, should return true:", PHP_EOL;
+var_dump(ftp_delete($ftp, 'file1'));
+
+echo "Test case #2: removal of non-existent file from FTP, should return false:", PHP_EOL;
+var_dump(ftp_delete($ftp, 'false-file.boo'));
+
+ftp_close($ftp);
+?>
+--EXPECTF--
+Test case #1: removal of existing file from FTP, should return true:
+bool(true)
+Test case #2: removal of non-existent file from FTP, should return false:
+
+Warning: ftp_delete(): No such file or directory in %s on line %d
+bool(false)

ext/ftp/tests/server.inc

@@ -356,6 +356,12 @@ if ($pid) {
 				fputs($s, "550 No file named \"{$matches [1]}\"\r\n");
 				break;
 			}
+        } elseif (preg_match('/^DELE ([\w\h]+)/', $buf, $matches)) {
+            if (isset($matches[1]) && in_array($matches[1], ['file1', "file\nb0rk"])){
+                fputs($s, "250 Delete successful\r\n");
+            } else {
+                fputs($s, "550 No such file or directory\r\n");
+			}
 		}elseif (preg_match('/^RETR ([\w\h]+)/', $buf, $matches)) {
 			if(!empty($pasv)){
 				;