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<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\Process;
use Symfony\Component\Process\Exception\LogicException;
use Symfony\Component\Process\Exception\RuntimeException;
/**
* PhpSubprocess runs a PHP command as a subprocess while keeping the original php.ini settings.
*
* For this, it generates a temporary php.ini file taking over all the current settings and disables
* loading additional .ini files. Basically, your command gets prefixed using "php -n -c /tmp/temp.ini".
*
* Given your php.ini contains "memory_limit=-1" and you have a "MemoryTest.php" with the following content:
*
* <?php var_dump(ini_get('memory_limit'));
*
* These are the differences between the regular Process and PhpSubprocess classes:
*
* $p = new Process(['php', '-d', 'memory_limit=256M', 'MemoryTest.php']);
* $p->run();
* print $p->getOutput()."\n";
*
* This will output "string(2) "-1", because the process is started with the default php.ini settings.
*
* $p = new PhpSubprocess(['MemoryTest.php'], null, null, 60, ['php', '-d', 'memory_limit=256M']);
* $p->run();
* print $p->getOutput()."\n";
*
* This will output "string(4) "256M"", because the process is started with the temporarily created php.ini settings.
*
* @author Yanick Witschi <yanick.witschi@terminal42.ch>
* @author Partially copied and heavily inspired from composer/xdebug-handler by John Stevenson <john-stevenson@blueyonder.co.uk>
*
* @psalm-import-type EnvArray from Process
*/
class PhpSubprocess extends Process
{
/**
* @param array $command The command to run and its arguments listed as separate entries. They will automatically
* get prefixed with the PHP binary
* @param string|null $cwd The working directory or null to use the working dir of the current PHP process
* @param EnvArray|null $env The environment variables or null to use the same environment as the current PHP process
* @param int $timeout The timeout in seconds
* @param array|null $php Path to the PHP binary to use with any additional arguments
*/
public function __construct(array $command, ?string $cwd = null, ?array $env = null, int $timeout = 60, ?array $php = null)
{
if (null === $php) {
$executableFinder = new PhpExecutableFinder();
$php = $executableFinder->find(false);
$php = false === $php ? null : array_merge([$php], $executableFinder->findArguments());
}
if (null === $php) {
throw new RuntimeException('Unable to find PHP binary.');
}
$tmpIni = $this->writeTmpIni($this->getAllIniFiles(), sys_get_temp_dir());
$php = array_merge($php, ['-n', '-c', $tmpIni]);
register_shutdown_function('unlink', $tmpIni);
$command = array_merge($php, $command);
parent::__construct($command, $cwd, $env, null, $timeout);
}
public static function fromShellCommandline(string $command, ?string $cwd = null, ?array $env = null, mixed $input = null, ?float $timeout = 60): static
{
throw new LogicException(\sprintf('The "%s()" method cannot be called when using "%s".', __METHOD__, self::class));
}
/**
* @param (callable('out'|'err', string):void)|null $callback
*/
public function start(?callable $callback = null, array $env = []): void
{
if (null === $this->getCommandLine()) {
throw new RuntimeException('Unable to find the PHP executable.');
}
parent::start($callback, $env);
}
private function writeTmpIni(array $iniFiles, string $tmpDir): string
{
if (false === $tmpfile = @tempnam($tmpDir, '')) {
throw new RuntimeException('Unable to create temporary ini file.');
}
// $iniFiles has at least one item and it may be empty
if ('' === $iniFiles[0]) {
array_shift($iniFiles);
}
$content = '';
foreach ($iniFiles as $file) {
// Check for inaccessible ini files
if (($data = @file_get_contents($file)) === false) {
throw new RuntimeException('Unable to read ini: '.$file);
}
// Check and remove directives after HOST and PATH sections
if (preg_match('/^\s*\[(?:PATH|HOST)\s*=/mi', $data, $matches, \PREG_OFFSET_CAPTURE)) {
$data = substr($data, 0, $matches[0][1]);
}
$content .= $data."\n";
}
// Merge loaded settings into our ini content, if it is valid
$config = parse_ini_string($content);
$loaded = ini_get_all(null, false);
if (false === $config || false === $loaded) {
throw new RuntimeException('Unable to parse ini data.');
}
$content .= $this->mergeLoadedConfig($loaded, $config);
// Work-around for https://bugs.php.net/bug.php?id=75932
$content .= "opcache.enable_cli=0\n";
if (false === @file_put_contents($tmpfile, $content)) {
throw new RuntimeException('Unable to write temporary ini file.');
}
return $tmpfile;
}
private function mergeLoadedConfig(array $loadedConfig, array $iniConfig): string
{
$content = '';
foreach ($loadedConfig as $name => $value) {
if (!\is_string($value)) {
continue;
}
if (!isset($iniConfig[$name]) || $iniConfig[$name] !== $value) {
// Double-quote escape each value
$content .= $name.'="'.addcslashes($value, '\\"')."\"\n";
}
}
return $content;
}
private function getAllIniFiles(): array
{
$paths = [(string) php_ini_loaded_file()];
if (false !== $scanned = php_ini_scanned_files()) {
$paths = array_merge($paths, array_map('trim', explode(',', $scanned)));
}
return $paths;
}
}