动态创建php 类函数或函数

<?php  
$func = 'test';  
  
function test(){  
    echo 'yes !';  
}  
  
$func();  
?>

<?php  
$newfunc = create_function('$a,$b', 'return $a.$b;');  
echo "New anonymous function: $newfunc<br>";  
echo $newfunc('just', 'coding');  
?>

<?php     
//5.3 以前     
$array = array( 'asbc', 'ddd', 'tttt', 'qqq');     
array_walk($array,create_function('&$item','$item=strtoupper($item);') ); //function(&$itm){$itm = strtoupper($itm);}     
print_r($array);  
  
//5.3 以后     
$array = array( 'asbc', 'ddd', 'tttt', 'qqq');     
array_walk($array,function(&$itm){$itm = strtoupper($itm);});      
print_r($array);  
?>

<?php  
/* create class */  
class Record {  
    
    /* record information will be held in here */  
    private $info;  
    
    /* constructor */  
    function Record($record_array) {  
        $record_array['body'] = 'this is a new attribution';  
        $this->info = $record_array;  
    }  
    
    /* dynamic function server */  
    function __call($method,$arguments) {  
        $meth = $this->from_case(substr($method,3,strlen($method)-3));  
        return array_key_exists($meth,$this->info) ? $this->info[$meth] : false;  
    }  
    
    function from_case($str) {  
        $str[0] = strtolower($str[0]);  
        $func = create_function('$c', 'return "_" . strtolower($c[1]);'); // function ($c) { return "_" . strtolower($c[1]); }  
        return preg_replace_callback('/([A-Z])/', $func, $str);  
    }    
}  
  
  
/* usage */  
$Record = new Record(  
    array(  
        'id' => 12,  
        'title' => 'Greatest Hits',  
        'description' => 'The greatest hits from the best band in the world!'  
    )  
);  
  
/* proof it works! */  
echo 'The ID is:  '.$Record->getId().'<br>'; // returns 12    
echo 'The Title is:  '.$Record->getTitle().'<br>'; // returns "Greatest Hits"  
echo 'The Description is:  '.$Record->getDescription().'<br>'; //returns "The greatest hits from the best band in the world!"  
echo 'The Body is:  '.$Record->getBody(); //returns "The greatest hits from the best band in the world!"  
?>