[PHP] - 创建函数别名

/**

 *

 * Function Name :

 *     val2str

 *     参考:http://www.php.net/manual/en/function.create-function.php#103080

 *

 * Description :

 *     将变量值变成php代码

 *

 * Parameters :

 *     $mixed[mixed] : 变量值

 *

 * Returns :

 *     [string]php代码

 *

 * Demo :

 *     $object = new stdClass;

 *     $object->arg = 'object';

 *     echo val2str($object);

 *

 *     $cls = new stdClass();

 *     $cls->key ='value';

 *     $array = (array)$cls;

 *     echo val2str($array);

 *     

 *     $temp = array(

 *         'int' => 100,

 *         'double' => 3.14,

 *         'string' => 'string test',

 *         'array' => array('test21' => 'ok21', 'test22' => 'ok22'),

 *         'object' => (object)array('test31' => 'ok31', 'test32' => 'ok32'),

 *         'bool' => true,

 *         'null' => NULL,

 *     );

 *     eval(sprintf('$test=%1$s;', val2str($temp)));

 *     print_r($test);

 */

function val2str($mixed) {

    // 获取变量名

    $var_name = '';

    

    // 获取变量值

    switch(gettype($mixed)) {

        case 'string':

            return sprintf('\'%1$s\'', $mixed);case 'object':

        case 'array':

            $isobject = false;

            if(is_object($mixed)) {

                $isobject = true;

                $mixed = get_object_vars($mixed);

            }

            

            $delimiter = ', ';

            $out = '';

            foreach($mixed as $key => $value) {

                $fun = __FUNCTION__;

                $out .= sprintf('%1$s\'%2$s\' => %3$s', $delimiter, $key, $fun($value));

            }

            if(!empty($out)) {

                // 删除前面的$delimiter

                $out = substr($out, strlen($delimiter));

            }

            $out = $isobject ? sprintf('(object)array(%1$s)', $out) : sprintf('array(%1$s)', $out);

            return $out;

        

        case 'boolean':

            return $mixed ? 'true' : 'false';

        

        case 'NULL':

            return 'NULL';

        

        //case 'integer':

        //case 'double':

        //case 'resource':

        default :

            return $mixed;

    }

}

/**

 *

 * Function Name :

 *     CreateFunctionAlias

 *     参考:http://www.php.net/manual/en/function.create-function.php#103080

 *

 * Description :

 *     创建函数别名

 *

 * Parameters :

 *     $function_name[string] : 函数名(必须已存在)

 *     $alias_name[string] : 新别名(必须不存在)

 *

 * Returns :

 *     [bool]返回结果

 *

 */

function CreateFunctionAlias($function_name, $alias_name)

{ 

    if(function_exists($alias_name)) 

        return false; 

    $rf = new ReflectionFunction($function_name); 

    $fproto = $alias_name.'('; 

    $fcall = $function_name.'('; 

    $need_comma = false; 

    

    foreach($rf->getParameters() as $param) 

    {

        if($need_comma) 

        { 

            $fproto .= ','; 

            $fcall .= ','; 

        } 



        $fproto .= '$'.$param->getName(); 

        $fcall .= '$'.$param->getName(); 



        if($param->isOptional() && $param->isDefaultValueAvailable()) 

        { 

            $val = $param->getDefaultValue();

            $fproto .= ' = '.val2str($val);

        } 

        $need_comma = true; 

    } 

    $fproto .= ')'; 

    $fcall .= ')'; 



    $f = sprintf('function %1$s{return %2$s;}', $fproto, $fcall);

    eval($f);

    

    return true; 

}

// 创建CreateFunctionAlias别名

if(!function_exists('function_alias')) {

    function function_alias($function_name, $alias_name)  {

        return CreateFunctionAlias($function_name, $alias_name) ;

    }

}