- str_split: documentation ( source)
<?php
$data['acountNumber'] = 453554334;
$data['acountNumber'] = strval($data['acountNumber']);
echo $data['acountNumber'];
die();
$accountNumber = str_split($data['acountNumber']);
$accountNumber_0 = $accountNumber[0];
$accountNumber_1 = $accountNumber[1];
$accountNumber_2 = $accountNumber[2];
$accountNumber_3 = $accountNumber[3];
$accountNumber_4 = $accountNumber[4];
$accountNumber_5 = $accountNumber[5];
$accountNumber_6 = $accountNumber[6];
$accountNumber_7 = $accountNumber[7];
$accountNumber_8 = $accountNumber[8];