I want to make transparent background here

[684425]

session_start(); 
$text = rand(10000,99999); 
$_SESSION["vercode"] = $text; 
$height = 25; 
$width = 65; 
  
$image_p = imagecreate($width, $height); 
$black = imagecolorallocate($image_p, 255, 255, 255); 
$white = imagecolorallocate($image_p, 0, 0, 0); 
$font_size = 14; 
  
imagestring($image_p, $font_size, 5, 5, $text, $white); 
imagejpeg($image_p, null, 80); 

The code above creates an image with white background. How to change it to create transparent background?

[Frank_b]

http://php.net/manual/en/function.imagecolortransparent.php

[QuickOldCar]

I recommend using imagepng

 

To retain transparency throughout multiple layers you need to use imagealphablending and imagesavealpha

 

And be sure to use imagedestroy to free the memory of images created

[CroNiX]

jpeg's don't do transparency. Use PNG as mentioned above.