Fix passing null to parameter of type string (php#12014)

This fixes builds without cgi or phpdbg: ./configure --disable-cgi --disable-phpdbg make ./sapi/cli/php run-tests.php Otherwise, deprecation warnings (since PHP-8.1) are emitted: Deprecated: escapeshellarg(): Passing null to parameter php#1 ($arg) of type string is deprecated in run-tests.php...

Author: petk

run-tests.php

@@ -683,8 +683,8 @@ function main(): void
  $environment['TEST_PHP_EXECUTABLE_ESCAPED'] = escapeshellarg($php);
  putenv("TEST_PHP_CGI_EXECUTABLE=$php_cgi");
  $environment['TEST_PHP_CGI_EXECUTABLE'] = $php_cgi;
- putenv("TEST_PHP_CGI_EXECUTABLE_ESCAPED=" . escapeshellarg($php_cgi));
- $environment['TEST_PHP_CGI_EXECUTABLE_ESCAPED'] = escapeshellarg($php_cgi);
+ putenv("TEST_PHP_CGI_EXECUTABLE_ESCAPED=" . escapeshellarg($php_cgi ?? ''));
+ $environment['TEST_PHP_CGI_EXECUTABLE_ESCAPED'] = escapeshellarg($php_cgi ?? '');
  putenv("TEST_PHPDBG_EXECUTABLE=$phpdbg");
  $environment['TEST_PHPDBG_EXECUTABLE'] = $phpdbg;
  putenv("TEST_PHPDBG_EXECUTABLE_ESCAPED=" . escapeshellarg($phpdbg ?? ''));