合并阵列输出一个只有唯一值的数组
问题描述:
我有2个数组,我需要合并来创建另一个具有唯一值的数组。数组2是可能的文件版本的完整列表,而数组1是这些文件的当前版本。如果从阵列1和阵列2项具有相同的id
价值,我想从阵列采取项目1合并阵列输出一个只有唯一值的数组
阵列1
$array1 = array(
array('id' => '8','file_extension_id' => '8','extension' => '','name' => 'GS','file_version' => '1.0.2'),
array('id' => '2','file_extension_id' => '2','extension' => 'gif', 'name' => 'GIF','file_version' => '1.0.2'),
array('id' => '1','file_extension_id' => '1','extension' => 'png','name' => 'PNG','file_version' => '1.0.2'),
array('id' => '19','file_extension_id' => '19','extension' => 'jpg','name' => 'JPG','file_version' => '1.0.2'),
array('id' => '20','file_extension_id' => '20','extension' => 'pdf','name' => 'PDF','file_version' => '1.0.2'),
);
阵列2
$array2 = array(
array('id' => '1','file_extension_id' => '','extension' => 'png','name' => 'PNG','file_version' => ''),
array('id' => '2','file_extension_id' => '','extension' => 'gif','name' => 'GIF','file_version' => ''),
array('id' => '3','file_extension_id' => '','extension' => 'doc','name' => 'Word 2003','file_version' => ''),
array('id' => '4','file_extension_id' => '','extension' => 'docx','name' => 'Word 2007+','file_version' => ''),
array('id' => '5','file_extension_id' => '','extension' => 'xlsx','name' => 'Excel 2010+','file_version' => ''),
array('id' => '6','file_extension_id' => '','extension' => 'docx','name' => 'Word 2010+','file_version' => ''),
array('id' => '7','file_extension_id' => '','extension' => 'numbers','name' => 'Mac Numbers','file_version' => ''),
array('id' => '8','file_extension_id' => '','extension' => '','name' => 'GS','file_version' => ''),
array('id' => '9','file_extension_id' => '','extension' => '','name' => 'Google Docs','file_version' => ''),
array('id' => '10','file_extension_id' => '','extension' => 'ots','name' => 'OpenOffice.org Calc','file_version' => ''),
array('id' => '11','file_extension_id' => '','extension' => 'ott','name' => 'OpenOffice.org Writer','file_version' => ''),
array('id' => '12','file_extension_id' => '','extension' => 'xlsx','name' => 'Excel for iPad','file_version' => ''),
array('id' => '13','file_extension_id' => '','extension' => 'xlsm','name' => 'Excel 2007 Macros','file_version' => ''),
array('id' => '14','file_extension_id' => '','extension' => 'xlsm','name' => 'Excel 2010 Macros','file_version' => ''),
array('id' => '15','file_extension_id' => '','extension' => 'xlsx','name' => 'Excel 2013+','file_version' => ''),
array('id' => '16','file_extension_id' => '','extension' => 'xlsm','name' => 'Excel 2013 Macros','file_version' => ''),
array('id' => '17','file_extension_id' => '','extension' => 'xlsx','name' => 'Excel 2016','file_version' => ''),
array('id' => '18','file_extension_id' => '','extension' => 'xlsm','name' => 'Excel 2016 Macros','file_version' => ''),
array('id' => '19','file_extension_id' => '','extension' => 'jpg','name' => 'JPG','file_version' => ''),
array('id' => '20','file_extension_id' => '','extension' => 'pdf','name' => 'PDF','file_version' => ''),
array('id' => '21','file_extension_id' => '','extension' => 'xlsx','name' => 'Excel for iPhone','file_version' => ''),
array('id' => '22','file_extension_id' => '','extension' => 'xlsx','name' => 'Excel for Android','file_version' => ''),
array('id' => '23','file_extension_id' => '','extension' => 'xls','name' => 'Excel 2003 Macros','file_version' => ''),
array('id' => '24','file_extension_id' => '','extension' => 'docx','name' => 'Word 2013+','file_version' => ''),
array('id' => '25','file_extension_id' => '','extension' => 'docx','name' => 'Word 2016','file_version' => '')
);
我不断收到尝试使用以下内容时出错:
$fileInVersion = array_merge($fileExists,$soft);
print_r(array_unique($fileInVersion));
这是错误:
Notice: Array to string conversion in /file.php on line 30
线30 print_r()
我怎么能这些阵列一起与id
唯一值合并吗?
答
首先重新索引$array2
。 array_column
可以使这个简单的:
$array2 = array_column($array2, null, 'id');
然后覆盖的钥匙,$array2
在$array1
具有匹配'id'
关键的每个值。
foreach ($array1 as $key => $value) {
$array2[$value['id']] = $value;
}
答
array_unique()
被设计为默认比较2维数组。如果要比较多个级别的阵列,则需要传入SORT_REGULAR
作为array_unique()
的第二个参数。
print_r(array_unique($fileInVersion, SORT_REGULAR));
答
array_unique()不适用于多维数组。 使用以下代码用于使用id
多维阵列
$fileInVersion = array_merge($fileExists,$soft);
$unique_array = array_map("unserialize", array_unique(array_map("serialize", $fileInVersion)));
print_r($unique_array);
你是对的,这是我的错。非常感谢!!! – AlexB
不客气。 –