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thinkphp/library/think/process/Utils.php

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+<?php
+// +----------------------------------------------------------------------
+// | TopThink [ WE CAN DO IT JUST THINK IT ]
+// +----------------------------------------------------------------------
+// | Copyright (c) 2015 http://www.topthink.com All rights reserved.
+// +----------------------------------------------------------------------
+// | Author: zhangyajun <448901948@qq.com>
+// +----------------------------------------------------------------------
+
+namespace think\process;
+
+class Utils
+{
+
+    /**
+     * 转义字符串
+     * @param string $argument
+     * @return string
+     */
+    public static function escapeArgument($argument)
+    {
+
+        if ('' === $argument) {
+            return escapeshellarg($argument);
+        }
+        $escapedArgument = '';
+        $quote           = false;
+        foreach (preg_split('/(")/i', $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;
+    }
+
+    /**
+     * 验证并进行规范化Process输入。
+     * @param string $caller
+     * @param mixed  $input
+     * @return string
+     * @throws \InvalidArgumentException
+     */
+    public static function validateInput($caller, $input)
+    {
+        if (null !== $input) {
+            if (is_resource($input)) {
+                return $input;
+            }
+            if (is_scalar($input)) {
+                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];
+    }
+
+}