3v4l.org

run code in 300+ PHP versions simultaneously
<?php session_start(); ?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/> <title>Admin Panel</title> <link href="style.css" type="text/css" rel="stylesheet" /> </head> <body id="admin"> <div id="wrapper"> <?php if(isset($_SESSION['name'])) { echo "<h3>Welcome to the Admin Panel, ". $_SESSION['name']."</h3>"; } else { header('location: index.php'); } ?> <p><a href="logout.php">Logout</a></p> </div> </body> </html>
Output for 7.0.18 - 7.0.20, 7.1.4 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/> <title>Admin Panel</title> <link href="style.css" type="text/css" rel="stylesheet" /> </head> <body id="admin"> <div id="wrapper"> Warning: Cannot modify header information - headers already sent by (output started at /in/PBfLB:2) in /in/PBfLB on line 16 <p><a href="logout.php">Logout</a></p> </div> </body> </html>
Output for 5.2.3 - 5.2.17, 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 - 7.0.17, 7.1.0 - 7.1.3
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/> <title>Admin Panel</title> <link href="style.css" type="text/css" rel="stylesheet" /> </head> <body id="admin"> <div id="wrapper"> Warning: Cannot modify header information - headers already sent by (output started at /in/PBfLB:12) in /in/PBfLB on line 16 <p><a href="logout.php">Logout</a></p> </div> </body> </html>
Output for 4.3.2 - 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
Warning: session_start(): Cannot send session cookie - headers already sent in /in/PBfLB on line 1 Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /in/PBfLB:1) in /in/PBfLB on line 1 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/> <title>Admin Panel</title> <link href="style.css" type="text/css" rel="stylesheet" /> </head> <body id="admin"> <div id="wrapper"> <p><a href="logout.php">Logout</a></p> </div> </body> </html>
Output for 4.3.0 - 4.3.1
Warning: session_start() [http://www.php.net/function.session-start]: Cannot send session cookie - headers already sent in /in/PBfLB on line 1 Warning: session_start() [http://www.php.net/function.session-start]: Cannot send session cache limiter - headers already sent (output started at /in/PBfLB:1) in /in/PBfLB on line 1 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/> <title>Admin Panel</title> <link href="style.css" type="text/css" rel="stylesheet" /> </head> <body id="admin"> <div id="wrapper"> <p><a href="logout.php">Logout</a></p> </div> </body> </html>

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