HJ Blog > Code Snippet #36: trace function

2006-01-12 00:47:36 trace function

( php ) ✂

<?php
function trace($description, $information=false, $active=true){
    if ($active && TRACE){
        $time = date('i:s');
        if($information)
            $displayinfo = $information;
        else
             $displayinfo = '{$description}';
        echo '<hr/>'.$time.' — <b>'.$description.':</b><br/><pre>'. $displayinfo .'</pre><hr/>';
    }
}
?>

  1  <?php
  2  function trace($description, $information=false, $active=true){
  3      if ($active && TRACE){
  4          $time = date('i:s');
  5          if($information)
  6              $displayinfo = $information;
  7          else
  8               $displayinfo = '{$description}';
  9          echo '<hr/>'.$time.' — <b>'.$description.':</b><br/><pre>'. $displayinfo .'</pre><hr/>';
 10      }
 11  }
 12  ?>

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Jeff (Thu, January 12th, 2006, 12:56am UTC)
Not relevant, but an optional way to write that if:
( php )
```
  1  $displayInfo = $information ? $information : '{$description}';
```
not that you didn't realize that.

jjb (Thu, January 12th, 2006, 1:02am UTC)

yeah that's how i initially had it, but when it wasn't working i did it the "traditional" way to make sure i wasn't missing anything.

here's what i got now

( php ) ✂

function trace($description, $information=false, $active=true){
    //TODO: add filename and linenumber info
    if ($active && TRACE){
        $time = date('i:s');
        if($information)
            $displayinfo = $information;
        else
            $displayinfo = '{$description}';
        echo '<hr/>'.$time.' — <b>'.$description.':</b><br/><pre>'.$displayinfo .'</pre><hr/>';
    }
}

  1  function trace($description, $information=false, $active=true){
  2      //TODO: add filename and linenumber info
  3      if ($active && TRACE){
  4          $time = date('i:s');
  5          if($information)
  6              $displayinfo = $information;
  7          else
  8              $displayinfo = '{$description}';
  9          echo '<hr/>'.$time.' — <b>'.$description.':</b><br/><pre>'.$displayinfo .'</pre><hr/>';
 10      }
 11  }

The new question is, if $description is a string, how do i get it to evaluate. hmm actually that might be impossible since the variable would be outside of the scope.

jjb (Thu, January 12th, 2006, 1:02am UTC)

WHOOPS. HERE is the latest version

( php ) ✂

function trace($description, $information=false, $active=true){
    //TODO: add filename and linenumber info
    if ($active && TRACE){
        $time = date('i:s');
        $information !== false ? $information : '{$description}';
        echo '<hr/>'.$time.' — <b>'.$description.':</b><br/><pre>'. $displayinfo .'</pre><hr/>';
    }
}

  1  function trace($description, $information=false, $active=true){
  2      //TODO: add filename and linenumber info
  3      if ($active && TRACE){
  4          $time = date('i:s');
  5          $information !== false ? $information : '{$description}';
  6          echo '<hr/>'.$time.' — <b>'.$description.':</b><br/><pre>'. $displayinfo .'</pre><hr/>';
  7      }
  8  }

Jeff (Thu, January 12th, 2006, 1:04am UTC)

when stoners code…
Jeff (Thu, January 12th, 2006, 1:06am UTC)

Explain what you want with $description