library/Msd/ConfigurationPhpValues.php

@@ -0,0 +1,136 @@
+<?php
+/**
+ * This file is part of MySQLDumper released under the GNU/GPL 2 license
+ * http://www.mysqldumper.net
+ *
+ * @package         MySQLDumper
+ * @subpackage      Configuration
+ * @version         SVN: $Rev$
+ * @author          $Author$
+ */
+/**
+ * Helper for getting dynamic configuration values like phpRam etc.
+ *
+ * @package         MySQLDumper
+ * @subpackage      Configuration
+ */
+class Msd_ConfigurationPhpValues
+{
+    /**
+     * Read dynamic PHP config values
+     *
+     * @return Zend_Config
+     */
+    public static function getDynamicValues ()
+    {
+        $phpRam = self::_getPhpRam();
+        $dynConfig = array(
+            'sendmailCall' => self::_getConfigSetting('sendmail_path'),
+            'safeMode' => self::_getConfigSetting('safe_mode', true),
+            'magicQuotesGpc' => get_magic_quotes_gpc(),
+            'disabledPhpFunctions' =>
+                str_replace(
+                    ',',
+                    ', ',
+                    self::_getConfigSetting('disable_functions')
+                ),
+            'maxExecutionTime' => self::_getMaxExecutionTime(),
+            'uploadMaxFilesize' => self::_getUploadMaxFilesize(),
+            'phpextensions' => implode(', ', get_loaded_extensions()),
+            'phpRam' => $phpRam,
+            'memoryLimit' => round($phpRam * 1024 * 1024 * 0.9, 0),
+            'compression' => self::_hasZlib(),
+        );
+        return new Zend_Config($dynConfig, true);
+    }
+
+    /**
+     * Read PHP's max_execution_time
+     *
+     * @return int
+     */
+    private static function _getMaxExecutionTime()
+    {
+        $maxExecutionTime =
+            self::_getConfigSetting('max_execution_time', true);
+        if ($maxExecutionTime <= 5) {
+            // we didn't get the real value from the server - some deliver "-1"
+            $maxExecutionTime = 30;
+        } elseif ($maxExecutionTime > 30) {
+            // we don't use more than 30 seconds to avoid brower timeouts
+            $maxExecutionTime = 30;
+        }
+        return $maxExecutionTime;
+    }
+
+    /**
+     * Get PHP's upload_max_filesize
+     *
+     * @return int
+     */
+    private static function _getUploadMaxFilesize()
+    {
+        $uploadMaxFilesize = self::_getConfigSetting('upload_max_filesize');
+        // Is value in Megabytes? If yes create output
+        if (strpos($uploadMaxFilesize, 'M')) {
+            $uploadMaxFilesize = str_replace('M', '', $uploadMaxFilesize);
+            $uploadMaxFilesize = trim($uploadMaxFilesize);
+            // re-calculate to Bytes
+           $uploadMaxFilesize *= 1024 * 1024;
+        }
+        return (int) $uploadMaxFilesize;;
+    }
+
+    /**
+     * Get PHP's ram size
+     *
+     * @return integer The memory limit in MB
+     */
+    private static function _getPhpRam()
+    {
+        $ram = self::_getConfigSetting('memory_limit');
+        // we don't trust the value delivered by server config if < 16
+        if ($ram < 16) {
+            $ram = 16;
+        }
+        return $ram;
+    }
+
+    /**
+     * Detect if zlib is installed
+     *
+     * @return boolean
+     */
+    private static function _hasZlib()
+    {
+        $zlib = false;
+        $extensions = get_loaded_extensions();
+        if (in_array('zlib', $extensions)) {
+            $zlib = true;
+        };
+        return (boolean) $zlib;
+    }
+
+    /**
+     * Returns a PHP-Setting from ini
+     *
+     * First try to read via ini_get(), then fall back to get_cfg_var()
+     *
+     * @param string  $varName     The name of the setting to read
+     * @param boolean $returnAsInt Whether to return value as integer
+     */
+    private function _getConfigSetting($varName, $returnAsInt = false)
+    {
+        $value = @ini_get($varName);
+
+        // fallback if ini_get doesn't work
+        if ($value == '' || $value === null) {
+            $value = @get_cfg_var($varName);
+        }
+
+        if ($returnAsInt) {
+            $value = (int) $value;
+        }
+        return $value;
+    }
+}