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<?php $upgradeKeys = array( 'featured-listing', 'basic-pack', 'designer-blog', 'power-pack' ); $_upgradeKeys = array_diff( $upgradeKeys, array( 'featured-listing', 'basic-pack', 'designer-blog', 'power-pack' ) ); $upgradeKeys = $_upgradeKeys; $upgradeKeys[] = 'power-pack'; print_r($upgradeKeys);
Output for git.master, git.master_jit, rfc.property-hooks
Array ( [0] => power-pack )

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