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@ 2012-10-21T12:51:49Z

<?php
$selected=array('11a_Ma1','11a_Sc2','11b_Ls1');
$already=array('11SJP','11a_Ma1','11a_Sc2');
print_r(array_diff($selected,$already));
print_r(array_diff($already,$selected));
$a1=array(1,2,3);
$a2=array(1,2,3);
$ad=array_diff($a1,$a2);
if(isset($ad)){echo "YEAH";}

Output
Performance
VLD
References
Branches

print_r: documentation ( source)
array_diff: documentation ( source)

preferences:dark modelive preview

35.86 ms | 402 KiB | 5 Q