Question

我知道当我在数组中寻找值时，我可以这样做。

$example = array('example','One more example','last example');
$searchword = 'last';
$matches = array_filter($example, function($var) use ($searchword) { return preg_match("/\b$searchword\b/i", $var); });

但是我想做这样的事情但是这个例子：

$example = array( "first" => "bar", "second" => "foo", "last example" => "boo");
$searchword = 'last';

如何更改此选项以获取包含searchword而非值？

的键值

$matches = array_filter($example, function($var) use ($searchword) { return preg_match("/\b$searchword\b/i", $var); });

Answer 1

您可以使用函数array_keys，它只获取数组$ example

的键

$matches = array_filter(array_keys($example), function($var) use ($searchword) { 
return preg_match("/\b$searchword\b/i", $var); });

Answer 2

你可以尝试这个。我们在这里使用array_flip，array_keys和preg_grep

解决方案1：

Try this code snippet here

<?php
$searchword = 'last';
$example = array( "first" => "bar", "second" => "foo", "last example" => "boo");
$result=array_flip(preg_grep("/$searchword/",array_keys($example)));
print_r(array_intersect_key($example, $result));

解决方案2：（Since PHP 5.6）@axiac的好推荐

Try this code snippet here

<?php
ini_set('display_errors', 1);
$searchword = 'last';
$example = array( "first" => "bar", "second" => "foo", "last example" => "boo");
$example=array_filter($example,function($value,$key) use($searchword){
    return strstr($key, $searchword);
},ARRAY_FILTER_USE_KEY);
print_r($example);

如何查找包含某些字符串的值的数组键

2 个答案: