如何在PHP中合并n个数组 我的意思是我怎么可以这样做的工作: array_merge(from : $result[0], to : $result[count($result)-1]) OR array_merge_recursive(from: $result[0], to : $result[count($result) -1])
array_merge(from : $result[0], to : $result[count($result)-1])
array_merge_recursive(from: $result[0], to : $result[count($result) -1])
$result里面有多个数组的数组在哪里,像这样:
$result
$result = Array( 0 => array(),//associative array 1 => array(),//associative array 2 => array(),//associative array 3 => array()//associative array )
我的结果是:
$result = Array( 0 => Array( "name" => "Name", "events" => 1, "types" => 2 ), 1 => Array( "name" => "Name", "events" => 1, "types" => 3 ), 2 => Array( "name" => "Name", "events" => 1, "types" => 4 ), 3 => Array( "name" => "Name", "events" => 2, "types" => 2 ), 4 => Array( "name" => "Name", "events" => 3, "types" => 2 ) )
我需要的是
$result = Array( "name" => "name", "events" => array(1,2,3), "types" => array(2,3,4) )
array_merge可以接受可变数量的参数,因此,使用一些call_user_func_array技巧,您可以将$result数组传递给它:
$merged = call_user_func_array('array_merge', $result);
基本上可以像输入以下内容一样运行:
$merged = array_merge($result[0], $result[1], .... $result[n]);
现在有了5.6,我们有了...运算符来将数组解压缩为参数,因此您可以:
...
$merged = array_merge(...$result);
并具有相同的结果。*
*如果在解压缩数组中具有整数键,则结果相同,否则会出现E_RECOVERABLE_ERROR : type 4096 -- Cannot unpack array with string keys错误。
E_RECOVERABLE_ERROR : type 4096 -- Cannot unpack array with string keys