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$new_array = Array();
foreach( $data as $key => $val )
{
if( in_array( $val, $new_array ) )
{
echo $key;
continue;
}
else
{
$new_array[] = $val;
}
}
写法是这样写,不过建议将数据存入数据库,那样方便多了,还效率