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<?php?> <form name="input" action="index.php" method="get"> Type in a number:<input type="text" name="xnumber"> <input type="submit" value="Submit"> </form> <?php function calculate($x, $y) { $newnum = $x * $y; return $newnum; } $multiply = $_GET["xnumber"]; echo "The new number is " . calculate($num, $multiply); $num = calculate($num, $multiply); ?>
Output for git.master, git.master_jit, rfc.property-hooks
<?php?> <form name="input" action="index.php" method="get"> Type in a number:<input type="text" name="xnumber"> <input type="submit" value="Submit"> </form> Warning: Undefined array key "xnumber" in /in/ceIuo on line 14 Warning: Undefined variable $num in /in/ceIuo on line 15 The new number is 0 Warning: Undefined variable $num in /in/ceIuo on line 16

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