- print_r: documentation ( source)
- sort: documentation ( source)
- array_diff: documentation ( source)
<?php
$upgradeKeys = array(
'featured-listing',
'basic-pack',
'designer-blog',
'power-pack'
);
$_upgradeKeys = array_diff(
$upgradeKeys,
array(
'featured-listing',
'basic-pack',
'designer-blog',
'power-pack'
)
);
sort($_upgradeKeys);
$upgradeKeys = $_upgradeKeys;
$upgradeKeys[] = 'power-pack';
print_r($_upgradeKeys);