Question

我有这个数组$node_actions：

Array
(
    [new] => yes
    [fav] => no
    [eye] => no
    [edit] => yes
    [delete] => yes
)

有时会出现一些元素（比如new或eye）。所以我需要定义一个具有此操作的变量：

$actions = $new.' '.$fav.' '.$eye.' '.$edit.' '.$delete;

我是这样做的：

if(!isset(($node_actions['new'])){
    $actions =$fav.' '.$eye.' '.$edit.' '.$delete;
}elseif(!isset(($node_actions['fav'])){
    $actions =$new.' '.$eye.' '.$edit.' '.$delete;
}elseif(!isset(($node_actions['eye'])){
    $actions =$new.' '.$fav.' '.$edit.' '.$delete;
}elseif(!isset(($node_actions['edit'])){
    $actions =$new.' '.$fav.' '.$eye.' '.$delete;
}elseif(!isset(($node_actions['delete'])){
    $actions =$new.' '.$fav.' '.$eye.' '.$edit;
}elseif(!isset(($node_actions['new']) && !isset(($node_actions['new']) ){
    $actions =$eye.' '.$edit.' '.$delete;
}else{

} //.... and so on

有一种优雅的简单方法吗？非常感谢。

Answer 1

尝试做：

$actions = "";
foreach($yourArr as $key => $val) {
  $actions .= $$key. " ";
}
$actions = trim($actions);

Answer 2

尝试使用循环

foreach($arr as $k=>$v) {
  if(!empty($v)) {
    $actions .= $v.' ';  // yes no no yes yes 
    //$actions .= $k.' '; //new fav eye edit delete 
  }
}
echo $actions;

Answer 3

我更喜欢这种方法 $ new = 1; $ fav = 2; $ eye = 4; $ edit = 8; $ delete = 16;是绑定到某个特定任务的变量，它们与来自GET或POST的某个变量（在本例中为$ action）相匹配

<?php

$new    = 1;
$fav    = 2;
$eye    = 4;
$edit   = 8;
$delete = 16;


$action = $fav | $eye; // OR $fav | $eye | $delete OR $new

if($action & $new) {
    echo "new";
} 

if($action & $fav) {
    echo "fav";
} 

if($action & $eye) {
    echo "eye";
} 

if($action & $edit) {
    echo "edit";
} 

if($action & $delete) {
    echo "delete";
} 

?>

希望这会对你有所帮助

定义变量的多重条件 - PHP

3 个答案: