在PHP中的数组开头插入值

我会用 array_merge()

将一个或多个数组的元素合并在一起,以便将一个数组的值附加到前一个数组的末尾。它返回结果数组。

$hello = array ("Code" => "Tir" .....); // you should really put quotes 
                                        // around the keys!
$world = array ("ref" => "World");

$merged = array_merge($world, $hello);

您可以使用 + 操作员:

$hello = array( 'Code' => 'TIR', 'Description' => 'Tires', 'Price' => 100 );
$hello = array('ref' => 'World') + $hello;
print_r($hello);

会给

Array
(
    [ref] => World
    [Code] => TIR
    [Description] => Tires
    [Price] => 100
)

就像佩卡说的,你应该在钥匙周围加上引号。这个 PHP manual explicitly states omitting quotes is wrong usage . 您可能还想退房 my answer about the difference between using the + operator vs using array_merge 决定你要用哪一个。

$a= array( 'a' => 'a' );
$b = array( 'b' => 'b' );

$res = $b + $a;
//result: ( 'b' => 'b', 'a' => 'a' )

$hello=array_merge(array('ref'=>'world'),$hello);