$result = array();
$list = "10 10 10 24 24 25 38 38";
foreach( explode( " ", $list ) as $value ) {
if ( ! isset( $result[ $value ] ) ) {
$result[ $value ] = true;
}
}
foreach( $result as $key => $value ) {
print $key . "
";
}
也就是利用 hash 的 key-value pair 原理，過濾掉重複的 key ^_^
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