dependency.php

FP2 CRM code+Mysql DB

        if (!extension_loaded($name)) {
            if ($relation == 'ne') {
                return false;
            }
            if ($opt) {
                $errmsg = "'$name' PHP extension is recommended to utilize some features";
                return PEAR_DEPENDENCY_MISSING_OPTIONAL;
            }
            $errmsg = "'$name' PHP extension is not installed";
            return PEAR_DEPENDENCY_MISSING;
        }
        if ($relation == 'has') {
            return false;
        }
        $code = false;
        if (is_string($req) && substr($req, 0, 2) == 'v.') {
            $req = substr($req, 2);
        }
        $ext_ver = phpversion($name);
        $operator = $relation;
        // Force params to be strings, otherwise the comparation will fail (ex. 0.9==0.90)
        if (!version_compare("$ext_ver", "$req", $operator)) {
            $errmsg = "'$name' PHP extension version " .
                $this->signOperator($operator) . " $req is required";
            $code = $this->codeFromRelation($relation, $ext_ver, $req, $opt);
            if ($opt) {
                $errmsg = "'$name' PHP extension version " . $this->signOperator($operator) .
                    " $req is recommended to utilize some features";
                return $code;
            }
        }
        return $code;
    }

    // }}}
    // {{{ checkOS()

    /**
     * Operating system  dependencies check method
     *
     * @param string $os  Name of the operating system
     *
     * @return mixed bool false if no error or the error string
     */
    function checkOS(&$errmsg, $os)
    {
        // XXX Fixme: Implement a more flexible way, like
        // comma separated values or something similar to PEAR_OS
        static $myos;
        if (empty($myos)) {
            include_once "OS/Guess.php";
            $myos = new OS_Guess();
        }
        // only 'has' relation is currently supported
        if ($myos->matchSignature($os)) {
            return false;
        }
        $errmsg = "'$os' operating system not supported";
        return PEAR_DEPENDENCY_CONFLICT;
    }

    // }}}
    // {{{ checkPHP()

    /**
     * PHP version check method
     *
     * @param string $req   which version to compare
     * @param string $relation  how to compare the version
     *
     * @return mixed bool false if no error or the error string
     */
    function checkPHP(&$errmsg, $req, $relation = 'ge')
    {
        // this would be a bit stupid, but oh well :)
        if ($relation == 'has') {
            return false;
        }
        if ($relation == 'not') {
            $errmsg = "Invalid dependency - 'not' is allowed when specifying PHP, you must run PHP in PHP";
            return PEAR_DEPENDENCY_BAD_DEPENDENCY;
        }
        if (substr($req, 0, 2) == 'v.') {
            $req = substr($req,2, strlen($req) - 2);
        }
        $php_ver = phpversion();
        $operator = $relation;
        if (!version_compare("$php_ver", "$req", $operator)) {
            $errmsg = "PHP version " . $this->signOperator($operator) .
                " $req is required";
            return PEAR_DEPENDENCY_CONFLICT;
        }
        return false;
    }

    // }}}
    // {{{ checkProgram()

    /**
     * External program check method.  Looks for executable files in
     * directories listed in the PATH environment variable.
     *
     * @param string $program   which program to look for
     *
     * @return mixed bool false if no error or the error string
     */
    function checkProgram(&$errmsg, $program)
    {
        // XXX FIXME honor safe mode
        $exe_suffix = OS_WINDOWS ? '.exe' : '';
        $path_elements = explode(PATH_SEPARATOR, getenv('PATH'));
        foreach ($path_elements as $dir) {
            $file = $dir . DIRECTORY_SEPARATOR . $program . $exe_suffix;
            if (@file_exists($file) && @is_executable($file)) {
                return false;
            }
        }
        $errmsg = "'$program' program is not present in the PATH";
        return PEAR_DEPENDENCY_MISSING;
    }

    // }}}
    // {{{ checkSAPI()

    /**
     * SAPI backend check method.  Version comparison is not yet
     * available here.
     *
     * @param string $name      name of SAPI backend
     * @param string $req   which version to compare
     * @param string $relation  how to compare versions (currently
     *                          hardcoded to 'has')
     * @return mixed bool false if no error or the error string
     */
    function checkSAPI(&$errmsg, $name, $req = null, $relation = 'has')
    {
        // XXX Fixme: There is no way to know if the user has or
        // not other SAPI backends installed than the installer one

        $sapi_backend = php_sapi_name();
        // Version comparisons not supported, sapi backends don't have
        // version information yet.
        if ($sapi_backend == $name) {
            return false;
        }
        $errmsg = "'$sapi_backend' SAPI backend not supported";
        return PEAR_DEPENDENCY_CONFLICT;
    }

    // }}}
    // {{{ checkZend()

    /**
     * Zend version check method
     *
     * @param string $req   which version to compare
     * @param string $relation  how to compare the version
     *
     * @return mixed bool false if no error or the error string
     */
    function checkZend(&$errmsg, $req, $relation = 'ge')
    {
        if (substr($req, 0, 2) == 'v.') {
            $req = substr($req,2, strlen($req) - 2);
        }
        $zend_ver = zend_version();
        $operator = substr($relation,0,2);
        if (!version_compare("$zend_ver", "$req", $operator)) {
            $errmsg = "Zend version " . $this->signOperator($operator) .
                " $req is required";
            return PEAR_DEPENDENCY_CONFLICT;
        }
        return false;
    }

    // }}}
    // {{{ signOperator()

    /**
     * Converts text comparing operators to them sign equivalents
     *
     * Example: 'ge' to '>='
     *
     * @access public
     * @param  string Operator
     * @return string Sign equivalent
     */
    function signOperator($operator)
    {
        switch($operator) {
            case 'lt': return '<';
            case 'le': return '<=';
            case 'gt': return '>';
            case 'ge': return '>=';
            case 'eq': return '==';
            case 'ne': return '!=';
            default:
                return $operator;
        }
    }

    // }}}
    // {{{ codeFromRelation()

    /**
     * Convert relation into corresponding code
     *
     * @access public
     * @param  string Relation
     * @param  string Version
     * @param  string Requirement
     * @param  bool   Optional dependency indicator
     * @return integer
     */
    function codeFromRelation($relation, $version, $req, $opt = false)
    {
        $code = PEAR_DEPENDENCY_BAD_DEPENDENCY;
        switch ($relation) {
            case 'gt': case 'ge': case 'eq':
                // upgrade
                $have_major = preg_replace('/\D.*/', '', $version);
                $need_major = preg_replace('/\D.*/', '', $req);
                if ($need_major > $have_major) {
                    $code = $opt ? PEAR_DEPENDENCY_UPGRADE_MAJOR_OPTIONAL :
                                   PEAR_DEPENDENCY_UPGRADE_MAJOR;
                } else {
                    $code = $opt ? PEAR_DEPENDENCY_UPGRADE_MINOR_OPTIONAL :
                                   PEAR_DEPENDENCY_UPGRADE_MINOR;
                }
                break;
            case 'lt': case 'le': case 'ne':
                $code = $opt ? PEAR_DEPENDENCY_CONFLICT_OPTIONAL :
                               PEAR_DEPENDENCY_CONFLICT;
                break;
        }
        return $code;
    }

    // }}}
}
?>