call_user_method

说明

mixed call_user_method ( string method_name, object &obj [, mixed parameter [, mixed ...]] )

警告

call_user_method() 函数从 PHP 4.1.0 开始已经停用，使用 call_user_func() 函数和 array(&$obj, "method_name") 语法代替。

从用户定义的 obj 对象中调用 method_name 指的方法。下边是用法示例，我们定义了一个类，接着创建了一个对象实例，然后使用 call_user_method() 间接调用它的 print_info 方法。


<?php
class Country {
    var $NAME;
    var $TLD;
    
    function Country($name, $tld)
    {
        $this->NAME = $name;
        $this->TLD = $tld;
    }

    function print_info($prestr="")
    {
        echo $prestr . "Country: " . $this->NAME . "\n";
        echo $prestr . "Top Level Domain: " . $this->TLD . "\n";
    }
}

$cntry = new Country("Peru", "pe");

echo "* Calling the object method directly\n";
$cntry->print_info();

echo "\n* Calling the same method indirectly\n";
call_user_method("print_info", $cntry, "\t");
?>

参见 call_user_func_array() 和 call_user_func()。

add a note User Contributed Notes

j dot h at h-elektro dot de
05-Feb-2007 08:11


It does not work to use Pointers as Arguments:



<?php

class abc{

   function func(&$argument)  {

       $argument="It works";

   } 

}



$obj=new abc;

$argument_to_be_changed="No it doesnt";

call_user_method("func", $obj, $argument_to_be_changed);



echo "Result".$argument_to_be_changed;

?>



The result is: "No it doesnt".



Regards

der Jan

jonathanMAPS_ON at NO_SPAMsharpmedia dot net
13-Mar-2001 11:06


You can also dynamically call functions through variable variables...for example:





<?php


class xyz{


   function mybar($str)


   {


     echo $str;


   }


}


$xyz = new xyz;


$foo = 'bar';





$xyz->{'my'.$foo}('dynamic call to function');


?>

paulo at emd dot com dot br
18-Sep-2000 12:12


This function is very similar to this:





$method="Print";


$object->$method($param1,$param2);





Note the extra $ after the ->

jmcastagnetto at php dot net
21-Aug-2000 12:04


You can pass a variable number of parameters to a function, use a definition like:





function mymethod ($v1, $v2, $v3="", $v4="")





and then you can pass 2, 3 or 4 parameters. This is explained in the "Functions" section of the manual.





See also the PHP4 functions: func_num_args(), func_get_arg(), and func_get_args(), and examples therein

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