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run code in 300+ PHP versions simultaneously
<html> <head><title>FORM</title></head> <body> <form method='GET'> <input type="text" name="textval"> <input type="SUBMIT" name="btnsub"> </form> <?php echo "Entered text: ".$_GET['textval']; ?> </body> </html>
Output for git.master, git.master_jit, rfc.property-hooks
<html> <head><title>FORM</title></head> <body> <form method='GET'> <input type="text" name="textval"> <input type="SUBMIT" name="btnsub"> </form> Warning: Undefined array key "textval" in /in/18RMY on line 10 Entered text: </body> </html>

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