3v4l.org

run code in 300+ PHP versions simultaneously
<html> <body> <form method="post" action="<?php echo $_SERVER['PHP_SELF'];?>"> Name: <input type="text" name="fname"> <input type="submit"> </form> <?php if ($_SERVER["REQUEST_METHOD"] == "POST") { // collect value of input field $name = $_REQUEST['fname']; if (empty($name)) { echo "Name is empty"; } else { echo $name; } } ?> </body> </html>
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.7
<html> <body> <form method="post" action="/in/oiFVo"> Name: <input type="text" name="fname"> <input type="submit"> </form> Warning: Undefined array key "REQUEST_METHOD" in /in/oiFVo on line 10 </body> </html>
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.30, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.31, 7.4.0 - 7.4.33
<html> <body> <form method="post" action="/in/oiFVo"> Name: <input type="text" name="fname"> <input type="submit"> </form> Notice: Undefined index: REQUEST_METHOD in /in/oiFVo on line 10 </body> </html>
Output for 7.3.32 - 7.3.33
<html> <body> <form method="post" action="/in/oiFVo"> Name: <input type="text" name="fname"> <input type="submit"> </form> </body> </html>
Output for 5.2.3 - 5.2.17
<html> <body> <form method="post" action="/in/oiFVo"> Name: <input type="text" name="fname"> <input type="submit"> </form> Notice: Undefined index: REQUEST_METHOD in /in/oiFVo on line 10 </body> </html>
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.2
<html> <body> <form method="post" action=""> Name: <input type="text" name="fname"> <input type="submit"> </form> Notice: Undefined index: REQUEST_METHOD in /in/oiFVo on line 10 </body> </html>

preferences:
246.43 ms | 403 KiB | 371 Q