equations in variables

[lordgreg]

<?php

$e = "3*4+1";

echo "result: ". ($e);

?>

i have equation saved in variables like in the above example. now, can you tell me, how to get the result from the equation which is stored like this? it's possible the results are decimal numbers, so (int) is out of the question...

thank you all

[inter_joe]

<?php
	$e = '$result = 3*4+1;';

eval($e);

echo "result: ". $result;
?>

should do the trick.
but always be careful, when you use eval. especially, if input comes from outside your script.

hope it helped

[lordgreg]

while ($row = mysql_fetch_object ($result))
{

  $enacba = $row->func;
  $enacba = str_replace ("C1", $BAKER, $enacba);
  $enacba = str_replace ("C2", $ZINC, $enacba);
  $enacba = str_replace ("C3", $TECAJ, $enacba);

  $e = '$result = $enacba;';

  eval($e);

  echo $result ."<br />\n";

}

doesn't work.. please help me...

i get parse error for eval function. how then to get the result if equations are stored in mysql db and taken into $enacba?

so.. how to get result from this:

$cifra = "((751.00/0.9873)/1000+0.775)*1.2";
$e = '$result = $cifra;';
eval($e);
echo "result: ". $result;

[Weedpacket]

  $e = '$result = '.$enacba.';';

See the manual on the subject of strings and how to quote them.