1.很多時候會遇到二維數組，轉為一維數組的時候會很苦惱，尤其是剛剛接觸PHP的phper。

如下：將$arr轉化為一維數組

$arr = Array (

Array ( 'uuid' => 'aaaaa' ),

Array ( 'uuid' => 'bbbbb' ),

Array ( 'uuid' => 'ccccc' ),

Array ( 'uuid' => 'sssss' ),

Array ( 'uuid' => 'ddddd' ),

Array ( 'uuid' => 'eeeee' ),

Array ( 'uuid' => 'fffff' ),

Array ( 'uuid' => 'ggggg' )

);

兩種方法：

1.foreach遍歷

$arr2 = array();

foreach ($arr as $key => $value) {

foreach ($value as $k => $v) {

$arr2[$key]=$v;

}

}

var_dump($arr2);

//array (size=8) 0 => string 'aaaaa' (length=5) 1 => string 'bbbbb' (length=5) 2 => string 'ccccc' (length=5) 3 => string 'sssss' (length=5) 4 => string 'ddddd' (length=5) 5 => string 'eeeee' (length=5) 6 => string 'fffff' (length=5) 7 => string 'ggggg' (length=5)

2.用array_column()函數

$arr2 = array_column($arr,'uuid');

var_dump($arr2);

//array (size=8) 0 => string 'aaaaa' (length=5) 1 => string 'bbbbb' (length=5) 2 => string 'ccccc' (length=5) 3 => string 'sssss' (length=5) 4 => string 'ddddd' (length=5) 5 => string 'eeeee' (length=5) 6 => string 'fffff' (length=5) 7 => string 'ggggg' (length=5)

總結

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