[php] php lambda，phplambda

[php] php lambda，phplambda

1 <?php
2 // http://cn.php.net/manual/zh/function.create-function.php
3 $lambda = create_function('$a,$b','return ($a > $b)? $a : $b;');
4 var_dump($lambda);
5 echo $lambda(1,2);

下面一些具体的示例

 1 function do_foreach($arrData,$func) {
 2     $arrResult = array(); 
 3     foreach($arrData as $row) {
 4         if($return = $func($row)) {
 5             $arrResult[] = $return;
 6         }
 7     }
 8     return $arrResult;
 9 }
10 
11 // 所有元素+1
12 $func1 = 'return $row + 1;';
13 var_dump(do_foreach(array(1,2,3,4),create_function('$row',$func1)));
14 
15 // 所有元素平方
16 $func1 = 'return $row * $row;';
17 var_dump(do_foreach(array(1,2,3,4),create_function('$row',$func1)));
18 
19 // 只是输出
20 $func1 = 'echo $row,"<br/>";';
21 do_foreach(array(1,2,3,4),create_function('$row',$func1));