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$_GET, $_POST じゃなくて filter_input 使えとのこと

スーパーグローバル変数に直接アクセスするより、filter_input 経由したほうがいいとのこと。

<?php

// こう書くよりも
$aaa = isset( $_GET["aaa"] ) ? $_GET["aaa"] : null;
$bbb = isset( $_POST["bbb"] ) ? $_POST["bbb"] : null;

// こう書くほうがよいとのこと
$aaa = filter_input( INPUT_GET, "aaa" );
$bbb = filter_input( INPUT_POST, "bbb" );

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164
Help us understand the problem. What are the problem?