Generate Debug Output to Another Window
Every time you view this page, we generate some debugging output using the following code:
include_once('lensdebug.inc.php');
$dbg = new LensDebug();
$dbg->v('This was generated using the LensDebug class');
$dbg->v(3.14, 'PI');
$dbg->v($dbg);
$dbg->v(array(1,2,3));
The file lensdebug.inc.php:
<?php
/********************************************************************************
Debug Variables - show debugging results in another window using javascript.
The original saved into a file then displayed it in a window
and was written by Alter Gr <alt-gr@gmx.de>.
The new version by John Lim <jlim@natsoft.com.my>
1. writes directly to the debug window without using an intermediate file
2. supports all types, including objects, floats and booleans
3. cleans up strings with < correctly using htmlspecialchars()
4. added msg()
5. added recursion check in v2()
Tested with IE 5.5 and Netscape 4.77 and 6.
usage:
$D = new LensDebug();
$D->v($var1,"var1"); // display a variable and its type
$D->msg('Show a text message');
second parameter is optional
Original (c) by DATABAY AG 2001 - ay@databay.de
Other portions (c) 2001 by John Lim
2 Dec 2001
Fixed $depth bug
This is free software. Use at your own risk.
********************************************************************************/
class LensDebug {
var $show = false;
var $depth = 0;
//------------------------------------------
// Format variable recursively based on type
function v2($V,$Name="",$class=false)
{
if ($this->depth > 32) return '<p>Recursive Depth Exceeded</p>';
$this->depth += 1;
$TYPE_COLOR = "RED";
$NAME_COLOR = "BLUE";
$VALUE_COLOR = "BLACK";
$D = "";
$Name = htmlspecialchars($Name);
$type = gettype($V);
if (is_string($V)) {
$V = htmlspecialchars($V);
$D = "<FONT COLOR=$TYPE_COLOR><B>$type: </B></FONT>";
if ($Name!="") $D .= "<FONT COLOR=$NAME_COLOR>$Name</FONT> = ";
$D .= "<FONT COLOR=$VALUE_COLOR>"$V"</FONT>";
} else if (is_object($V)) {
$D .= $this->v2(get_object_vars($V),$Name,get_class($V));
$D = substr($D,0,strlen($D)-4); // get rid of last BR
} else if (is_array($V)) {
if ($class) $t = "Class $class";
else $t = 'Array';
$D = "<FONT COLOR=$TYPE_COLOR><B>$t: </B></FONT>";
if ($Name!="") $D .= " (<FONT COLOR=$NAME_COLOR>$Name</FONT>) ";
$D .= "<FONT COLOR=$VALUE_COLOR><UL>";
foreach($V as $key => $val) {
$D .= $this->v2($val,$key);
}
//$D = substr($D,0,strlen($D)-4); // get rid of last BR
$D .= "</UL></FONT>";
} else {
if ($V === null) $V = 'null';
else if ($V === false) $V = 'false';
else if ($V === true) $V = 'true';
$D = "<FONT COLOR=$TYPE_COLOR><B>$type: </B></FONT>";
if ($Name!="") $D .= "<FONT COLOR=$NAME_COLOR>$Name</FONT> = ";
$D .= "<FONT COLOR=$VALUE_COLOR>$V</FONT>";
}
$D .= "<BR>";
$this->depth -= 1;
return($D);
}
function _show()
{
if (!$this->show) {
global $PHP_SELF;
$file = $PHP_SELF;
$D = "<TABLE SIZE=100% CELLSPACING=0 CELLPADDING=0 BORDER=0><TR><TD><HR SIZE=1></TD><TD WIDTH=1%><FONT FACE='Verdana,arial' SIZE=1>".date("d.m.Y")." ".date("H:i:s")."</FONT></TD></TR></TABLE>";
?>
<SCRIPT>
lensdebugw=window.open('',"DEBUGVAR","WIDTH=450,HEIGHT=500,scrollbars=yes,resizable=yes");
if (lensdebugw) {
lensdebugw.focus();
lensdebugw.document.write("<?php echo $D;?>"+'<b>'+window.location.href+'</b></p>');
}
</SCRIPT>
<?php
$this->show = true;
}
}
//---------------------------------
// display message in debug window
function msg($D,$encode=true)
{
$this->_show();
if ($encode) $D = htmlspecialchars($D).'<p>';
$D = str_replace('\\','\\\\',$D);
$D = str_replace('"','\"',$D);
$D = str_replace("\r",' ',$D);
$D = str_replace("\n",' ',$D);
?>
<SCRIPT>
if (lensdebugw) {
lensdebugw.document.write("<?php echo $D; ?>");
lensdebugw.scrollBy(0,100000);
}
</SCRIPT>
<?php
}
//---------------------------------
// display variable in debug window
function v($V,$Name="")
{
$this->_show();
$D = $this->v2($V,$Name);
if (!is_object($V) and !is_array($V)) $D .= '<br>';
$this->msg($D,false);
}
} // LensDebug class
?>
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