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edit approved Feb 6, 2014 at 9:51
Tom
edit approved Feb 6, 2014 at 9:51
Tom
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iI have made this simple php to check if a number is a positivpositive or a negative, it. It works but iI get this notice: Undefined index: submit.

<?php if (!$_POST["submit"])  {  ?>  <body>  <form action="<?=$_SERVER['PHP_SELF']?>" method="post">  Enter a number: <input name="number" size="2">  <input type="submit" name="submit" value="Go">  </form>  </body>  <?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 0';  } } ?>

Im new at php so if you can and want :)

i have made this simple php to check if a number is a positiv or a negative, it works but i get this notice: Undefined index: submit.

<?php if (!$_POST["submit"]) { ?> <body> <form action="<?=$_SERVER['PHP_SELF']?>" method="post"> Enter a number: <input name="number" size="2"> <input type="submit" name="submit" value="Go"> </form> </body> <?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 0'; } } ?>

Im new at php so if you can and want :)

I have made this simple php to check if a number is a positive or a negative. It works but I get this notice: Undefined index: submit.

<?php if (!$_POST["submit"])  {  ?>  <body>  <form action="<?=$_SERVER['PHP_SELF']?>" method="post">  Enter a number: <input name="number" size="2">  <input type="submit" name="submit" value="Go">  </form>  </body>  <?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 0';  } } ?>

Im new at php so if you can and want :)

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user3278887
user3278887
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Undefined index: submit

i have made this simple php to check if a number is a positiv or a negative, it works but i get this notice: Undefined index: submit.

<?php if (!$_POST["submit"]) { ?> <body> <form action="<?=$_SERVER['PHP_SELF']?>" method="post"> Enter a number: <input name="number" size="2"> <input type="submit" name="submit" value="Go"> </form> </body> <?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 0'; } } ?>

Im new at php so if you can and want :)