移除php中关联数组中具有重复值的数组
移除php中关联数组中具有重复值的数组
提问于 2013-03-22 04:04:52
我有这个数组
$arr[] = array('id' => '1', 'fn' => 'Some', 'ln' => 'Test', 'email' => 'email@test.com', 'dm' => 'test');
$arr[] = array('id' => '2', 'fn' => 'Some2', 'ln' => 'Test2', 'email' => 'otheremail@test.com', 'dm' => 'test');
$arr[] = array('id' => '3', 'fn' => 'Some3', 'ln' => 'Test3', 'email' => 'email@test.com', 'dm' => 'test');我想删除所有具有重复电子邮件的重复密钥$arr[]，以便只保留以下内容：
$arr[] = array('id' => '1', 'fn' => 'Some', 'ln' => 'Test', 'email' => 'email@test.com', 'dm' => 'test');
$arr[] = array('id' => '2', 'fn' => 'Some2', 'ln' => 'Test2', 'email' => 'otheremail@test.com', 'dm' => 'test');我在这里找到了不同的例子，但没有一个能与我的问题相匹配。谢谢
回答 1
Stack Overflow用户
回答已采纳
发布于 2013-03-22 04:11:06
$arr = array(
array('id' => '1', 'fn' => 'Some', 'ln' => 'Test', 'email' => 'email@test.com', 'dm' => 'test'),
array('id' => '1', 'fn' => 'Some', 'ln' => 'Test', 'email' => 'other@test.com', 'dm' => 'test'),
array('id' => '1', 'fn' => 'Some', 'ln' => 'Test', 'email' => 'email@test.com', 'dm' => 'test'),
array('id' => '1', 'fn' => 'Some', 'ln' => 'Test', 'email' => 'email@test.com', 'dm' => 'test'),
array('id' => '1', 'fn' => 'Some', 'ln' => 'Test', 'email' => 'other@test.com', 'dm' => 'test')
);
$checkEmail = array(); // restore email values
for($i=0;$i<count($arr);$i++){
if (!in_array($arr[$i]['email'], $checkEmail)){ // check in each array if email value is unique
print_r($arr[$i]); // if unique then output
}
$checkEmail[$i] = $arr[$i]['email']; // save email values
}OUTPUT ->
Array ( [id] => 1 [fn] => Some [ln] => Test [email] => email@test.com [dm] => test ) Array ( [id] => 1 [fn] => Some [ln] => Test [email] => other@test.com [dm] => test )页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/15556980
复制相关文章
相似问题