如何从以某个字符串开头的数组中获取所有键? [英] How to get all keys from a array that start with a certain string?

问题描述

我有一个看起来像这样的数组:

I have an array that looks like this:

array(
  'abc' => 0,
  'foo-bcd' => 1,
  'foo-def' => 1,
  'foo-xyz' => 0,
  // ...
)

如何只获取以 foo- 开头的元素?

How can I get only the elements that start with foo- ?

推荐答案

$arr_main_array = array('foo-test' => 123, 'other-test' => 456, 'foo-result' => 789);

foreach($arr_main_array as $key => $value){
    $exp_key = explode('-', $key);
    if($exp_key[0] == 'foo'){
         $arr_result[] = $value;
    }
}

if(isset($arr_result)){
    print_r($arr_result);
}

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