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//array_reverse (ÇÛÎó, ÏÀÍýÃÍ);

$ar = array("PHP", "CGI", "Perl", "Web");
$ar1 = array_reverse($ar);
print_r($ar1);

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$ar2 = array_reverse($ar, true);
print_r($ar2);
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 Array ( [0] => Web [1] => Perl [2] => CGI [3] => PHP ) 

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 Array ( [3] => Web [2] => Perl [1] => CGI [0] => PHP ) 
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 Array ( [0] => Array ( [0] => Perl [1] => Web ) [1] => CGI [2] => PHP ) 
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$ar = array("PHP", "CGI", array("Perl", "Web"));
$ar1 = array_reverse($ar);
print_r($ar1);