- var_dump: documentation ( source)
- explode: documentation ( source)
- ksort: documentation ( source)
<?php
$string = 'Spider-man|Spider-man 2|Spider-man 3|Apple|Google|Banana|Citrus';
$result = array();
foreach(explode('|', $string) as $item) {
$firstLetter = $item[0];
if(!isset($result[$firstLetter])) {
$result[$firstLetter] = array();
}
$result[$firstLetter][] = $item;
}
ksort($result);
var_dump($result);