创建函数别名代码,PHP代码库,德仔网

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【PHP】创建函数别名
作者:Dezai.CN / 发布于2013/10/22/ 556

	/**
	*
	* 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) ;
	 }
	}
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