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<?php
$a = 1;
function b(&$c)
{
$c++;
return $c;
}
$d=b($a); // d = 2; a = 2;
$d++; // d = 2;
echo($a); // ÏÔʾ2
?>
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<?php
$a = 1;
function &b(&$c)
{
$c++;
return $c;
}
$d=b($a); // ×¢ÒâÕâÀï dÓëb·µ»ØµÄÖµ(È·ÇÐÀ´Ëµ, ÕâÀï·µ»ØµÄ²»ÊÇÖµ, ¶øÊÇÒ»¸öÒýÓÃ, ¶ÔaµÄÒýÓÃ)½øÐÐ°ó¶¨ d = 2; a = 2;
$d++; // d = 3; a = 3;!!!
echo($a); // ÏÔʾ3
?>
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