PHP Text to Image

Change the settings and the click Create

Text		The text to display
Rotation		0=normal 90=sideways
Font Size		Points
Font
Padding		Space around the image
Transparent
Fore Colour	R G B	(0-255)
Back Colour	R G B	(0-255)
(pop-up window)

Description

This script is a means to convert a string of text into an image. This has some simple uses such as displaying text such as email address that cannot be programmatically found. This can help to reduce the possibility of your email address being picked up by web crawlers and used for junk mail.

How To Use

To use the example interface above, simply modify or insert the string of text. You can edit any of the other settings, but this is optional.

Further Uses and Ideas:

How it Works:

The PHP Script

/* text to image converter daftlogic www.daftlogic.com */ Header("Content-type: image/png"); class textPNG { var $font = 'fonts/TIMES.TTF'; //default font. directory relative to script directory. var $msg = "no text"; // default text to display. var $size = 24; // default font size. var $rot = 0; // rotation in degrees. var $pad = 0; // padding. var $transparent = 1; // transparency set to on. var $red = 0; // white text... var $grn = 0; var $blu = 0; var $bg_red = 255; // on black background. var $bg_grn = 255; var $bg_blu = 255; function draw() { $width = 0; $height = 0; $offset_x = 0; $offset_y = 0; $bounds = array(); $image = ""; // get the font height. $bounds = ImageTTFBBox($this->size, $this->rot, $this->font, "W"); if ($this->rot < 0) { $font_height = abs($bounds[7]-$bounds[1]); } else if ($this->rot > 0) { $font_height = abs($bounds[1]-$bounds[7]); } else { $font_height = abs($bounds[7]-$bounds[1]); } // determine bounding box. $bounds = ImageTTFBBox($this->size, $this->rot, $this->font, $this->msg); if ($this->rot < 0) { $width = abs($bounds[4]-$bounds[0]); $height = abs($bounds[3]-$bounds[7]); $offset_y = $font_height; $offset_x = 0; } else if ($this->rot > 0) { $width = abs($bounds[2]-$bounds[6]); $height = abs($bounds[1]-$bounds[5]); $offset_y = abs($bounds[7]-$bounds[5])+$font_height; $offset_x = abs($bounds[0]-$bounds[6]); } else { $width = abs($bounds[4]-$bounds[6]); $height = abs($bounds[7]-$bounds[1]); $offset_y = $font_height;; $offset_x = 0; } $image = imagecreate($width+($this->pad*2)+1,$height+($this->pad*2)+1); $background = ImageColorAllocate($image, $this->bg_red, $this->bg_grn, $this->bg_blu); $foreground = ImageColorAllocate($image, $this->red, $this->grn, $this->blu); if ($this->transparent) ImageColorTransparent($image, $background); ImageInterlace($image, false); // render the image ImageTTFText($image, $this->size, $this->rot, $offset_x+$this->pad, $offset_y+$this->pad, $foreground, $this->font, $this->msg); // output PNG object. imagePNG($image); } } $text = new textPNG; if (isset($msg)) $text->msg = $msg; // text to display if (isset($font)) $text->font = $font; // font to use (include directory if needed). if (isset($size)) $text->size = $size; // size in points if (isset($rot)) $text->rot = $rot; // rotation if (isset($pad)) $text->pad = $pad; // padding in pixels around text. if (isset($red)) $text->red = $red; // text color if (isset($grn)) $text->grn = $grn; // .. if (isset($blu)) $text->blu = $blu; // .. if (isset($bg_red)) $text->bg_red = $bg_red; // background color. if (isset($bg_grn)) $text->bg_grn = $bg_grn; // .. if (isset($bg_blu)) $text->bg_blu = $bg_blu; // .. if (isset($tr)) $text->transparent = $tr; // transparency flag (boolean). $text->draw(); // GO!!!!! ?>

Further Help

For anyone finding problems using this...

(1) Please test this example to ensure imagecreate works on your server...

<?php
header("Content-type: image/png");
$im = @imagecreate(110, 20)
or die("Cannot Initialize new GD image stream");
$background_color = imagecolorallocate($im, 0, 0, 0);
$text_color = imagecolorallocate($im, 233, 14, 91);
imagestring($im, 1, 5, 5, "A Simple Text String", $text_color);
imagepng($im);
imagedestroy($im);
?>

(2) Make sure to use the example at the top of this page by sending POST variables from your form. For example msg,font,size ...

Relevant Links

PHP Manual - http://uk2.php.net/imagepng
http://uk3.php.net/imagecreate

Previous Comments For This Page

it is working in localhost but not in server 
 By subhas on 23/09/2009

this doesn't work.  all i changed in the script was "default font. directory relative to script directory." to my fonts path directory and added the PHP  to the front/end of the script and it doesn't work.  when i run the script i keep getting the default text converted to image "no text".  if i type new text in the form fields or change any of the values none of that is changed in the image.  its always the "no text" image that comes up. 
 On 05/06/2009

you need to enforce a maximum font size (input value) with php to prevent abuse. 
 On 28/01/2009

Does not seem to work with non-latin text. 
 By Tael_ on 17/12/2008

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Logic, but in a different way

Daft Logic