PHP 數組去掉相同項

$a = array(    array("id"=>7, "title"=>"a"),    array("id"=>5, "title"=>"z"),);$b = array(    array("id"=>5, "title"=>"a"),    array("id"=>1, "title"=>"z"),    array("id"=>2, "title"=>"z"),);//去掉 $b中 id 在 $a 中存在的項//結果$b = array(    array("id"=>1, "title"=>"z"),    array("id"=>2, "title"=>"z"),);

回複討論(解決方案)

$a = array(    array("id"=>7, "title"=>"a"),    array("id"=>5, "title"=>"z"),); $b = array(    array("id"=>5, "title"=>"a"),    array("id"=>1, "title"=>"z"),    array("id"=>2, "title"=>"z"),); foreach($b as $k=>$v)  foreach($a as $t) if($v['id'] == $t['id']) unset($b[$k]);print_r($b);

Array(    [1] => Array        (            [id] => 1            [title] => z        )    [2] => Array        (            [id] => 2            [title] => z        ))

$a = array(    array("id"=>7, "title"=>"a"),    array("id"=>5, "title"=>"z"),); $b = array(    array("id"=>5, "title"=>"a"),    array("id"=>1, "title"=>"z"),    array("id"=>2, "title"=>"z"),); foreach($b as $k=>$v)  foreach($a as $t) if($v['id'] == $t['id']) unset($b[$k]);print_r($b);

Array(    [1] => Array        (            [id] => 1            [title] => z        )    [2] => Array        (            [id] => 2            [title] => z        ))

在迴圈的過程中移除某個項，接下來的迴圈不受影響？

foreach 不受影響
for 受影響

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