将所有值转换为多维PHP数组中的单个字符串吗？

Question

$array = array(
    array(
        'id' => 1,
        'first_name' => 'testOne',
    ),
    array(
        'id' => 333,
        'first_name' => 'test333',
    )
);

必需的输出：

array("1_testOne","333_test333");

Answer 1

这应该有帮助-

array_map(function($a) {
    return implode('_', $a); // implode all with '_'
}, $array); 

array_map()

Answer 2

$array = array(
             array(
                'id' => 1,
                'first_name' => 'testOne',
             ),
             array(
                'id' => 333,
                 'first_name' => 'test333',
             )
         );

$new_array = [];

foreach($array as $key => $value) {
   $new_array[] = $value['id'] . "_" . $value['first_name'];

}
echo "<pre>";
print_r($new_array);

它将返回输出为

Array('1_testOne', '333_test333')