Question

我的页面有搜索引擎。因此，我想为每个结果输出数组键。

所以我有这段代码：

$results = search($keywords);
$results_num = count($results); //what shows the message how many items were found

if (!empty($errors){
foreach ($results as $result){
    echo "this is result: "
.$result['key'];       //thought would be the solution, its not.
    }
} else {
    foreach ($errors as $error){
        $error;
    }
}

我也试过使用像：

这样的计数器

$results = search($keywords);
$results_num = count($results); //what shows the message how many items were found
$counter = 0;

if (!empty($errors){
foreach ($results as $result){
    $counter++;
    echo "this is result: "
.$counter;
    }
} else {
    foreach ($errors as $error){
        $error;
    }
}

什么不起作用，因为我认为，仍然不是那么专业。所以，如果有人能告诉我如何解决这个问题，我真的很感激。非常感谢。

Answer 1

foreach ($results as $key => $result) {
  echo 'this is result: ' . $key;
}

当前key将分配给$key，该属性的value将分配给$result

http://php.net/manual/en/control-structures.foreach.php

修改

在回应您的评论时，我认为这是您要实现的目标： -

$i=0; foreach($results as $result) { echo 'this is result: ' . ++$i; }

Answer 2

foreach($arr as $key=>$val){
//do something with key and value
}

Answer 3

在代码中，您可以先检查$results array is not empty because sometime due to empty $results array foreach generates error

/*Check if $results array is empty or not*/
if(!empty($results)){  
 foreach ($results as $key=>$result){
  /*result you want to show here according conditions*/
 }
}

输出每个结果的特定数组键

3 个答案: