dynamic image display in src attribute of img tag

**kushalpuri** · May 16 '07, 04:15 PM

Hi

The problem you are discussing here is "CAPTCHA" .you can find the code from phpclasses.org for this by searching with captcha

regards,
Kushal Puri

Originally posted by benoypaul

Hi,

I want to display images randomly in my new user registration form as like new user registration form of rediff (Verify your registration item in rediff). I know how to give php program as src attribute of img tag. Also know php code. If any one know this, please let me know.

Thanks in Advance

**benoypaul** · May 19 '07, 06:07 AM

Thanks.

I got some php code for captcha. But it is not displaying image. code is given below

form.php

?php
session_start() ;
?>
<HTML>
<HEAD>
<TITLE>PHP-CAPTCHA </TITLE>
<META HTTP-EQUIV=\"Content-Type\" CONTENT=\"text/html; charset=iso-8859-1\">
</HEAD>
<BODY onLoad="return focuson();">
<script language="javas cript">
function focuson()
{ document.form1. number.focus()}

function check()
{
if(document.for m1.number.value ==0)
{
alert("Please enter your Category Name");
document.form1. number.focus();
return false;
}
}

</script>
<?php

if(isset($_REQU EST['Submit'])){
$key=substr($_S ESSION['key'],0,5);
$number = $_REQUEST['number'];
if($number!=$ke y){
echo '<center><font face="Verdana, Arial, Helvetica, sans-serif" color="#FF0000" >
Validation string not valid! Please try again!</font></center>';}
else{
echo '<center><font face="Verdana, Arial, Helvetica, sans-serif" color="#66CC00" >
Your string is valid!</font></center>';}
}
?>
<form name="form1" method="post" action="form.ph p" onSubmit="retur n check();">
<table width="342" align="center" cellspacing="0" bgcolor="#D4D0C 8">
<tr>
<td colspan="4" align="center"> <hr></td>
</tr>
<tr>
<td width="8" align="center">  </td>
<td width="330" align="right" valign="top">&n bsp;</td>
<td width="330" align="right" valign="top">&n bsp;</td>
<td width="2" align="center">  </td>
</tr>
<tr>
<td align="center">  </td>
<td align="right" valign="top">&n bsp;</td>
<td align="right" valign="top">&n bsp;</td>
<td align="center">  </td>
</tr>

<tr>
<td align="center">  </td>
<td align="center">  </td>
<td align="center"> <img src="php_captch a.php"></td>
<td align="center">  </td>
</tr>
<tr>
<td align="center">  </td>
<td align="center">  </td>
<td align="center">  </td>
<td align="center">  </td>
</tr>
<tr>
<td align="center">  </td>
<td align="center"> Please enter the string shown in the image in the form.<br></td>
<td align="center"> <input name="number" type="text" id=\"numbe r\"></td>
<td align="center">  </td>
</tr>
<tr>
<td align="center">  </td>
<td align="center">  </td>
<td align="center">  </td>
<td align="center">  </td>
</tr>
<tr>
<td align="center">  </td>
<td align="center">  </td>
<td align="center"> <input name="Submit" type="submit" value="Submit"> </td>
<td align="center">  </td>
</tr>
<tr>
<td colspan="4" align="center"> <hr></td>
</tr>
</table>
</form>
</BODY>
</HTML>

php_captcha.php
<?php
session_start() ;

$RandomStr = md5(microtime() );// md5 to generate the random string

$ResultStr = substr($RandomS tr,0,5);//trim 5 digit

$NewImage =imagecreatefro mjpeg("img.jpg" );//image create by existing image and as back ground

$LineColor = imagecoloralloc ate($NewImage,2 33,239,239);//line color
$TextColor = imagecoloralloc ate($NewImage, 255, 255, 255);//text color-white

imageline($NewI mage,1,1,40,40, $LineColor);//create line 1 on image
imageline($NewI mage,1,100,60,0 ,$LineColor);//create line 2 on image

imagestring($Ne wImage, 5, 20, 10, $ResultStr, $TextColor);// Draw a random string horizontally

$_SESSION['key'] = $ResultStr;// carry the data through session

header("Content-type: image/jpeg");// out out the image

imagejpeg($NewI mage);//Output image to browser

?>

dynamic image display in src attribute of img tag

dynamic image display in src attribute of img tag

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