dependency2.php

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            return phpversion($name);
        } else {
            return phpversion();
        }
    }

    function validateExtensionDependency($dep, $required = true)
    {
        if ($this->_state != PEAR_VALIDATE_INSTALLING &&
              $this->_state != PEAR_VALIDATE_DOWNLOADING) {
            return true;
        }
        $loaded = $this->extension_loaded($dep['name']);
        $extra = $this->_getExtraString($dep);
        if (isset($dep['exclude'])) {
            if (!is_array($dep['exclude'])) {
                $dep['exclude'] = array($dep['exclude']);
            }
        }
        if (!isset($dep['min']) && !isset($dep['max']) &&
              !isset($dep['recommended']) && !isset($dep['exclude'])) {
            if ($loaded) {
                if (isset($dep['conflicts'])) {
                    if (!isset($this->_options['nodeps']) && !isset($this->_options['force'])) {
                        return $this->raiseError('%s conflicts with PHP extension "' .
                            $dep['name'] . '"' . $extra);
                    } else {
                        return $this->warning('warning: %s conflicts with PHP extension "' .
                            $dep['name'] . '"' . $extra);
                    }
                }
                return true;
            } else {
                if (isset($dep['conflicts'])) {
                    return true;
                }
                if ($required) {
                    if (!isset($this->_options['nodeps']) && !isset($this->_options['force'])) {
                        return $this->raiseError('%s requires PHP extension "' .
                            $dep['name'] . '"' . $extra);
                    } else {
                        return $this->warning('warning: %s requires PHP extension "' .
                            $dep['name'] . '"' . $extra);
                    }
                } else {
                    return $this->warning('%s can optionally use PHP extension "' .
                        $dep['name'] . '"' . $extra);
                }
            }
        }
        if (!$loaded) {
            if (isset($dep['conflicts'])) {
                return true;
            }
            if (!$required) {
                return $this->warning('%s can optionally use PHP extension "' .
                    $dep['name'] . '"' . $extra);
            } else {
                if (!isset($this->_options['nodeps']) && !isset($this->_options['force'])) {
                    return $this->raiseError('%s requires PHP extension "' . $dep['name'] .
                        '"' . $extra);
                }
                    return $this->warning('warning: %s requires PHP extension "' . $dep['name'] .
                        '"' . $extra);
            }
        }
        $version = (string) $this->phpversion($dep['name']);
        if (empty($version)) {
            $version = '0';
        }
        $fail = false;
        if (isset($dep['min'])) {
            if (!version_compare($version, $dep['min'], '>=')) {
                $fail = true;
            }
        }
        if (isset($dep['max'])) {
            if (!version_compare($version, $dep['max'], '<=')) {
                $fail = true;
            }
        }
        if ($fail && !isset($dep['conflicts'])) {
            if (!isset($this->_options['nodeps']) && !isset($this->_options['force'])) {
                return $this->raiseError('%s requires PHP extension "' . $dep['name'] .
                    '"' . $extra . ', installed version is ' . $version);
            } else {
                return $this->warning('warning: %s requires PHP extension "' . $dep['name'] .
                    '"' . $extra . ', installed version is ' . $version);
            }
        } elseif ((isset($dep['min']) || isset($dep['max'])) && !$fail && isset($dep['conflicts'])) {
            if (!isset($this->_options['nodeps']) && !isset($this->_options['force'])) {
                return $this->raiseError('%s conflicts with PHP extension "' .
                    $dep['name'] . '"' . $extra . ', installed version is ' . $version);
            } else {
                return $this->warning('warning: %s conflicts with PHP extension "' .
                    $dep['name'] . '"' . $extra . ', installed version is ' . $version);
            }
        }
        if (isset($dep['exclude'])) {
            foreach ($dep['exclude'] as $exclude) {
                if (version_compare($version, $exclude, '==')) {
                    if (isset($dep['conflicts'])) {
                        continue;
                    }
                    if (!isset($this->_options['nodeps']) &&
                          !isset($this->_options['force'])) {
                        return $this->raiseError('%s is not compatible with PHP extension "' .
                            $dep['name'] . '" version ' .
                            $exclude);
                    } else {
                        return $this->warning('warning: %s is not compatible with PHP extension "' .
                            $dep['name'] . '" version ' .
                            $exclude);
                    }
                } elseif (version_compare($version, $exclude, '!=') && isset($dep['conflicts'])) {
                    if (!isset($this->_options['nodeps']) && !isset($this->_options['force'])) {
                        return $this->raiseError('%s conflicts with PHP extension "' .
                            $dep['name'] . '"' . $extra . ', installed version is ' . $version);
                    } else {
                        return $this->warning('warning: %s conflicts with PHP extension "' .
                            $dep['name'] . '"' . $extra . ', installed version is ' . $version);
                    }
                }
            }
        }
        if (isset($dep['recommended'])) {
            if (version_compare($version, $dep['recommended'], '==')) {
                return true;
            } else {
                if (!isset($this->_options['nodeps']) && !isset($this->_options['force'])) {
                    return $this->raiseError('%s dependency: PHP extension ' . $dep['name'] .
                        ' version "' . $version . '"' .
                        ' is not the recommended version "' . $dep['recommended'] .
                        '", but may be compatible, use --force to install');
                } else {
                    return $this->warning('warning: %s dependency: PHP extension ' .
                        $dep['name'] . ' version "' . $version . '"' .
                        ' is not the recommended version "' . $dep['recommended'].'"');
                }
            }
        }
        return true;
    }

    function validatePhpDependency($dep)
    {
        if ($this->_state != PEAR_VALIDATE_INSTALLING &&
              $this->_state != PEAR_VALIDATE_DOWNLOADING) {
            return true;
        }
        $version = $this->phpversion();
        $extra = $this->_getExtraString($dep);
        if (isset($dep['exclude'])) {
            if (!is_array($dep['exclude'])) {
                $dep['exclude'] = array($dep['exclude']);
            }
        }
        if (isset($dep['min'])) {
            if (!version_compare($version, $dep['min'], '>=')) {
                if (!isset($this->_options['nodeps']) && !isset($this->_options['force'])) {
                    return $this->raiseError('%s requires PHP' .
                        $extra . ', installed version is ' . $version);
                } else {
                    return $this->warning('warning: %s requires PHP' .
                        $extra . ', installed version is ' . $version);
                }
            }
        }
        if (isset($dep['max'])) {
            if (!version_compare($version, $dep['max'], '<=')) {
                if (!isset($this->_options['nodeps']) && !isset($this->_options['force'])) {
                    return $this->raiseError('%s requires PHP' .
                        $extra . ', installed version is ' . $version);
                } else {
                    return $this->warning('warning: %s requires PHP' .
                        $extra . ', installed version is ' . $version);
                }
            }
        }
        if (isset($dep['exclude'])) {
            foreach ($dep['exclude'] as $exclude) {
                if (version_compare($version, $exclude, '==')) {
                    if (!isset($this->_options['nodeps']) &&
                          !isset($this->_options['force'])) {
                        return $this->raiseError('%s is not compatible with PHP version ' .
                            $exclude);
                    } else {
                        return $this->warning(
                            'warning: %s is not compatible with PHP version ' .
                            $exclude);
                    }
                }
            }
        }
        return true;
    }

    /**
     * This makes unit-testing a heck of a lot easier
     */
    function getPEARVersion()
    {
        return '1.6.1';
    }

    function validatePearinstallerDependency($dep)
    {
        $pearversion = $this->getPEARVersion();
        $extra = $this->_getExtraString($dep);
        if (isset($dep['exclude'])) {
            if (!is_array($dep['exclude'])) {
                $dep['exclude'] = array($dep['exclude']);
            }
        }
        if (version_compare($pearversion, $dep['min'], '<')) {
            if (!isset($this->_options['nodeps']) && !isset($this->_options['force'])) {
                return $this->raiseError('%s requires PEAR Installer' . $extra .
                    ', installed version is ' . $pearversion);
            } else {
                return $this->warning('warning: %s requires PEAR Installer' . $extra .
                    ', installed version is ' . $pearversion);
            }
        }
        if (isset($dep['max'])) {
            if (version_compare($pearversion, $dep['max'], '>')) {
                if (!isset($this->_options['nodeps']) && !isset($this->_options['force'])) {
                    return $this->raiseError('%s requires PEAR Installer' . $extra .
                        ', installed version is ' . $pearversion);
                } else {
                    return $this->warning('warning: %s requires PEAR Installer' . $extra .
                        ', installed version is ' . $pearversion);
                }
            }
        }
        if (isset($dep['exclude'])) {
            if (!isset($dep['exclude'][0])) {
                $dep['exclude'] = array($dep['exclude']);
            }
            foreach ($dep['exclude'] as $exclude) {
                if (version_compare($exclude, $pearversion, '==')) {
                    if (!isset($this->_options['nodeps']) && !isset($this->_options['force'])) {
                        return $this->raiseError('%s is not compatible with PEAR Installer ' .
                            'version ' . $exclude);
                    } else {
                        return $this->warning('warning: %s is not compatible with PEAR ' .
                            'Installer version ' . $exclude);
                    }
                }
            }
        }
        return true;
    }

    function validateSubpackageDependency($dep, $required, $params)
    {
        return $this->validatePackageDependency($dep, $required, $params);
    }

    /**
     * @param array dependency information (2.0 format)
     * @param boolean whether this is a required dependency
     * @param array a list of downloaded packages to be installed, if any
     * @param boolean if true, then deps on pear.php.net that fail will also check
     *                against pecl.php.net packages to accomodate extensions that have
     *                moved to pecl.php.net from pear.php.net
     */
    function validatePackageDependency($dep, $required, $params, $depv1 = false)
    {
        if ($this->_state != PEAR_VALIDATE_INSTALLING &&
              $this->_state != PEAR_VALIDATE_DOWNLOADING) {
            return true;
        }
        if (isset($dep['providesextension'])) {
            if ($this->extension_loaded($dep['providesextension'])) {
                $save = $dep;
                $subdep = $dep;
                $subdep['name'] = $subdep['providesextension'];
                PEAR::pushErrorHandling(PEAR_ERROR_RETURN);
                $ret = $this->validateExtensionDependency($subdep, $required);
                PEAR::popErrorHandling();
                if (!PEAR::isError($ret)) {
                    return true;
                }
            }
        }
        if ($this->_state == PEAR_VALIDATE_INSTALLING) {
            return $this->_validatePackageInstall($dep, $required, $depv1);
        }
        if ($this->_state == PEAR_VALIDATE_DOWNLOADING) {
            return $this->_validatePackageDownload($dep, $required, $params, $depv1);
        }
    }

    function _validatePackageDownload($dep, $required, $params, $depv1 = false)
    {
        $dep['package'] = $dep['name'];
        if (isset($dep['uri'])) {
            $dep['channel'] = '__uri';
        }
        $depname = $this->_registry->parsedPackageNameToString($dep, true);
        $found = false;
        foreach ($params as $param) {
            if ($param->isEqual(
                  array('package' => $dep['name'],
                        'channel' => $dep['channel']))) {
                $found = true;
                break;
            }
            if ($depv1 && $dep['channel'] == 'pear.php.net') {
                if ($param->isEqual(
                  array('package' => $dep['name'],
                        'channel' => 'pecl.php.net'))) {
                    $found = true;
                    break;
                }
            }
        }
        if (!$found && isset($dep['providesextension'])) {
            foreach ($params as $param) {
                if ($param->isExtension($dep['providesextension'])) {
                    $found = true;
                    break;
                }
            }
        }