PHP: Description of core php.ini directives - Manual
![POST['foo']とfilter_input(INPUT_POST, 'foo')の違い - Qiita](https://qiita-user-contents.imgix.net/https%3A%2F%2Fcdn.qiita.com%2Fassets%2Fpublic%2Farticle-ogp-background-9f5428127621718a910c8b63951390ad.png?ixlib=rb-4.0.0&w=1200&mark64=aHR0cHM6Ly9xaWl0YS11c2VyLWNvbnRlbnRzLmltZ2l4Lm5ldC9-dGV4dD9peGxpYj1yYi00LjAuMCZ3PTkxNiZ0eHQ9JTI0X1BPU1QlNUIlMjdmb28lMjclNUQlRTMlODElQThmaWx0ZXJfaW5wdXQlMjhJTlBVVF9QT1NUJTJDJTIwJTI3Zm9vJTI3JTI5JUUzJTgxJUFFJUU5JTgxJTk1JUUzJTgxJTg0JnR4dC1jb2xvcj0lMjMyMTIxMjEmdHh0LWZvbnQ9SGlyYWdpbm8lMjBTYW5zJTIwVzYmdHh0LXNpemU9NTYmdHh0LWNsaXA9ZWxsaXBzaXMmdHh0LWFsaWduPWxlZnQlMkN0b3Amcz1jMjMyYjEzMTA1ZTQ1ZjZjYzlhMjY5YTNjYzY4OTEzZQ&mark-x=142&mark-y=112&blend64=aHR0cHM6Ly9xaWl0YS11c2VyLWNvbnRlbnRzLmltZ2l4Lm5ldC9-dGV4dD9peGxpYj1yYi00LjAuMCZ3PTYxNiZ0eHQ9JTQwdGtlazMyMSZ0eHQtY29sb3I9JTIzMjEyMTIxJnR4dC1mb250PUhpcmFnaW5vJTIwU2FucyUyMFc2JnR4dC1zaXplPTM2JnR4dC1hbGlnbj1sZWZ0JTJDdG9wJnM9NGQ4MTViY2M0ODI4M2ZlN2Q5NTg4ZDI1OWVjZTY1ZWY&blend-x=142&blend-y=491&blend-mode=normal&s=bc5278e79e5a0827853144a3ef23bd43 "POST['foo']とfilter_input(INPUT_POST, 'foo')の違い - Qiita")
POST['foo']とfilter_input(INPUT_POST, 'foo')の違い - Qiita
![php] filter_input って便利 - Qiita](https://qiita-user-contents.imgix.net/https%3A%2F%2Fcdn.qiita.com%2Fassets%2Fpublic%2Farticle-ogp-background-9f5428127621718a910c8b63951390ad.png?ixlib=rb-4.0.0&w=1200&mark64=aHR0cHM6Ly9xaWl0YS11c2VyLWNvbnRlbnRzLmltZ2l4Lm5ldC9-dGV4dD9peGxpYj1yYi00LjAuMCZ3PTkxNiZ0eHQ9JTVCcGhwJTVEJTIwZmlsdGVyX2lucHV0JTIwJUUzJTgxJUEzJUUzJTgxJUE2JUU0JUJFJUJGJUU1JTg4JUE5JnR4dC1jb2xvcj0lMjMyMTIxMjEmdHh0LWZvbnQ9SGlyYWdpbm8lMjBTYW5zJTIwVzYmdHh0LXNpemU9NTYmdHh0LWNsaXA9ZWxsaXBzaXMmdHh0LWFsaWduPWxlZnQlMkN0b3Amcz04YTFkMTI2YzUwZjk4N2JkZGNiMjQ0YmYzN2M1NTBkNA&mark-x=142&mark-y=112&blend64=aHR0cHM6Ly9xaWl0YS11c2VyLWNvbnRlbnRzLmltZ2l4Lm5ldC9-dGV4dD9peGxpYj1yYi00LjAuMCZ3PTYxNiZ0eHQ9JTQwN0ZlZXRfUiZ0eHQtY29sb3I9JTIzMjEyMTIxJnR4dC1mb250PUhpcmFnaW5vJTIwU2FucyUyMFc2JnR4dC1zaXplPTM2JnR4dC1hbGlnbj1sZWZ0JTJDdG9wJnM9N2FkNzVkZDJhNGQ4ZDdkOWY2MjFiZDY1ZWM5MGNjYzI&blend-x=142&blend-y=491&blend-mode=normal&s=2d9afa117236da27957a555ff7ab5cc4 "php] filter_input って便利 - Qiita")
php] filter_input って便利 - Qiita
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Q&A] PHPでそれぞれの投稿に返信機能を実装したい - Qiita
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