在php中的特定键之后获取所有数组键

Question

I have an array like this,

$ptJson = {
    ["phoneSMS1"]=> "mobile",
    ["phoneSMS2"]=> "mobile",
    ["phoneSMS3"]=> "mobile",
    ["phoneSMS4"]=> "mobile",
    ["phoneSMS5"]=> "main"
}

And I have to delete the phoneSMS3, so I used unset to unset the key

unset($ptJson['phoneSMS3']);

It worked great.! Now I want to move rest keys level-up by one, but don't know how. Searched but have no luck.

So, how to find the rest array keys after phoneSMS3?

Answer 1

I'd iterate over the keys from the position you want to remove till the end of the array and assign the following key to the current position in each iteration:

$prefix = 'phoneSMS';
$index = 3;

while (array_key_exists($prefix . ($index + 1), $ptJson)) {
    $ptJson[$prefix . $index] = $ptJson[$prefix . ($index + 1)];
    ++$index;
}
unset($ptJson[$prefix . $index]);