php处理字符串
比如：$a = '1,2,3,4,5,6';
$b = '4,5,6,7';
如何将重复的值去掉，变成下面这样
$newnum = '1,2,3,7'; $a = explode(',', $a);
$b = explode(',', $b);
$temp1 = array_diff($a, $b);
$temp2 = array_diff($b, $a);
$newnum = array_merge($temp1, $temp2);
$newnum = implode(',', $newnum); 感谢。:handshake
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