以下數組,須要返回 first_name 列,須要怎麼作php
$records = array( array( 'id' => 2135, 'first_name' => 'John', 'last_name' => 'Doe', ), array( 'id' => 3245, 'first_name' => 'Sally', 'last_name' => 'Smith', ), array( 'id' => 5342, 'first_name' => 'Jane', 'last_name' => 'Jones', ), array( 'id' => 5623, 'first_name' => 'Peter', 'last_name' => 'Doe', ) );
若是是換作之前,確定寫一個循環來獲取。數組
可是 php 內置函數早就有這個功能了,那就是 array_column函數
下面代碼將會返回:blog
$first_names = array_column($records, 'first_name'); print_r($first_names);
Array ( [0] => John [1] => Sally [2] => Jane [3] => Peter )
加入第三個參數,把 key 也返回,以下:it
$last_names = array_column($records, 'last_name', 'id'); print_r($last_names);
Array ( [2135] => Doe [3245] => Smith [5342] => Jones [5623] => Doe )