3v4l.org

run code in 300+ PHP versions simultaneously
<html> <head> </head> <title> </title> <body> <?php if (!$_POST['submit']) { ?> <form action="<?= $_SERVER['SELF_PHP'];?>" method="post" > Enter any Number:<input name="number" size="2"> <input type="submit" name="submit" value="OK!"> <?php } else { $number=$_POST['number']; if ($number >0) { echo 'You entered a positive number'; } elseif ($number < 0) { echo 'You entered a negative number'; } else { echo 'You entered zero'; } } ?> </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 - 8.3.4, 8.3.6
<html> <head> </head> <title> </title> <body> Warning: Undefined array key "submit" in /in/QjBnH on line 6 <form action=" Warning: Undefined array key "SELF_PHP" in /in/QjBnH on line 8 " method="post" > Enter any Number:<input name="number" size="2"> <input type="submit" name="submit" value="OK!"> </body> </html>
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 <html> <head> </head> <title> </title> <body> Warning: Undefined array key "submit" in /in/QjBnH on line 6 <form action=" Warning: Undefined array key "SELF_PHP" in /in/QjBnH on line 8 " method="post" > Enter any Number:<input name="number" size="2"> <input type="submit" name="submit" value="OK!"> </body> </html>
Output for 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.6 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.33
<html> <head> </head> <title> </title> <body> Notice: Undefined index: submit in /in/QjBnH on line 6 <form action=" Notice: Undefined index: SELF_PHP in /in/QjBnH on line 8 " method="post" > Enter any Number:<input name="number" size="2"> <input type="submit" name="submit" value="OK!"> </body> </html>
Output for 7.3.32 - 7.3.33
<html> <head> </head> <title> </title> <body> <form action="" method="post" > Enter any Number:<input name="number" size="2"> <input type="submit" name="submit" value="OK!"> </body> </html>
Output for 5.3.0 - 5.3.29
<html> <head> </head> <title> </title> <body> Notice: Undefined index: submit in /in/QjBnH on line 6 <form action="<?= $_SERVER['SELF_PHP'];?>" method="post" > Enter any Number:<input name="number" size="2"> <input type="submit" name="submit" value="OK!"> </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 - 5.2.17
<html> <head> </head> <title> </title> <body> Notice: Undefined index: submit in /in/QjBnH on line 6 <form action="<?= $_SERVER['SELF_PHP'];?>" method="post" > Enter any Number:<input name="number" size="2"> <input type="submit" name="submit" value="OK!"> </body> </html>

preferences:
240.94 ms | 403 KiB | 341 Q