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authorAndrew Manning <tamanning@zoho.com>2016-05-01 22:29:51 -0400
committerAndrew Manning <tamanning@zoho.com>2016-05-01 22:29:51 -0400
commitc2d15e6c3bd8a29bae89d184a999ddac15fcb807 (patch)
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parentb1ae4d776c7c093c7f3ff6905e1a5302fbd5e3f6 (diff)
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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\InvalidArgumentException;
+
+/**
+ * ProcessUtils is a bunch of utility methods.
+ *
+ * This class contains static methods only and is not meant to be instantiated.
+ *
+ * @author Martin HasoĊˆ <martin.hason@gmail.com>
+ */
+class ProcessUtils
+{
+ /**
+ * This class should not be instantiated.
+ */
+ private function __construct()
+ {
+ }
+
+ /**
+ * Escapes a string to be used as a shell argument.
+ *
+ * @param string $argument The argument that will be escaped
+ *
+ * @return string The escaped argument
+ */
+ public static function escapeArgument($argument)
+ {
+ //Fix for PHP bug #43784 escapeshellarg removes % from given string
+ //Fix for PHP bug #49446 escapeshellarg doesn't work on Windows
+ //@see https://bugs.php.net/bug.php?id=43784
+ //@see https://bugs.php.net/bug.php?id=49446
+ if ('\\' === DIRECTORY_SEPARATOR) {
+ if ('' === $argument) {
+ return escapeshellarg($argument);
+ }
+
+ $escapedArgument = '';
+ $quote = false;
+ foreach (preg_split('/(")/', $argument, -1, PREG_SPLIT_NO_EMPTY | PREG_SPLIT_DELIM_CAPTURE) as $part) {
+ if ('"' === $part) {
+ $escapedArgument .= '\\"';
+ } elseif (self::isSurroundedBy($part, '%')) {
+ // Avoid environment variable expansion
+ $escapedArgument .= '^%"'.substr($part, 1, -1).'"^%';
+ } else {
+ // escape trailing backslash
+ if ('\\' === substr($part, -1)) {
+ $part .= '\\';
+ }
+ $quote = true;
+ $escapedArgument .= $part;
+ }
+ }
+ if ($quote) {
+ $escapedArgument = '"'.$escapedArgument.'"';
+ }
+
+ return $escapedArgument;
+ }
+
+ return escapeshellarg($argument);
+ }
+
+ /**
+ * Validates and normalizes a Process input.
+ *
+ * @param string $caller The name of method call that validates the input
+ * @param mixed $input The input to validate
+ *
+ * @return string The validated input
+ *
+ * @throws InvalidArgumentException In case the input is not valid
+ *
+ * Passing an object as an input is deprecated since version 2.5 and will be removed in 3.0.
+ */
+ public static function validateInput($caller, $input)
+ {
+ if (null !== $input) {
+ if (is_resource($input)) {
+ return $input;
+ }
+ if (is_scalar($input)) {
+ return (string) $input;
+ }
+ // deprecated as of Symfony 2.5, to be removed in 3.0
+ if (is_object($input) && method_exists($input, '__toString')) {
+ @trigger_error('Passing an object as an input is deprecated since version 2.5 and will be removed in 3.0.', E_USER_DEPRECATED);
+
+ return (string) $input;
+ }
+
+ throw new InvalidArgumentException(sprintf('%s only accepts strings or stream resources.', $caller));
+ }
+
+ return $input;
+ }
+
+ private static function isSurroundedBy($arg, $char)
+ {
+ return 2 < strlen($arg) && $char === $arg[0] && $char === $arg[strlen($arg) - 1];
+ }
+}