how to append data in existing array without overwrite whole array [closed]

问题

This question is unlikely to help any future visitors; it is only relevant to a small geographic area, a specific moment in time, or an extraordinarily narrow situation that is not generally applicable to the worldwide audience of the internet. For help making this question more broadly applicable, visit the help center.

Closed 7 years ago.

This is my code, in this code, I am reading an existing array through a function read_from_json, which convert JSON to array, now from remote data I am getting new data so I have to append those data in my existing array without overwriting the whole array. Like if I am getting an id, it searches using the in_array function, if it is not found then sending a message to it, and then append the only specific entry to existing array. There is a problem due to foreach iteration so it overwrites all array, what else can I do. Please have a look at this code:

$read_data = $this->read_from_json( 'xyz.json' );

foreach ( $projects_id_tickcamp as $tick_id => $base_id ) {

            if ( !$this->in_array( $base_id['base_id'], $read_data ) ) {

                echo '<b>do post message function for ' . $tick_id . ' ' . $base_id['base_id'] . '</b><br />';

                $i = count( $read_data );

                while ( $i >= count( $base_id['base_id'] ) ) {

                    echo 'post message start' .'<br />';
                    $i++;
                    break;
                    $projects_id_tickcamp[$tick_id]['message_id'] = 1;

                }

                //echo 'posted message id of ' . $base_id['basecamp_id'] . '<br />';
            } else {
                echo 'do nothing' . '<br />';
                //return false;
            }
        }

        //echo 'write data if id similar' . '<br />';
        $this->write_to_json( 'xyz.json', $projects_id_tickcamp );
        return $projects_id_tick;

The output of the above code looks like:

Array
(
    [125434] => Array
        (
            [base_id] => 1306755
        )

    [127354] => Array
        (
            [base_id] => 1287834
        )

)

if a new id fetch from remote then id writes only in last place of array.

回答1:

You have a few options:

• array_push()
• array_merge( $curr_array, $new_array )
• $array[] = $newValue

Good luck!

回答2:

after returning another value,using array_merge will fix this.

example:

$result_array=array_merge($arr1,$arr2);

回答3:

If you want to append something to a PHP array, you can use $myArray[] = "new value"

来源：https://stackoverflow.com/questions/12893246/how-to-append-data-in-existing-array-without-overwrite-whole-array