McDarren 

$line1 = 'asdadAADSAsdfsfASASDjljsdASDAS';
$line2 = 'GKHSKJADHasdadhkadhGHKJHKJHasdada';

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do you mean to say that should I need traverse each character and change it to upper/lower ?

In reply to Re^2: uppercase/lowercase in a single expression by greatshots
in thread uppercase/lowercase in a single expression by greatshots

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