Convert text to image in php

Basic idea behind converting text to image is to avoid spammers grabbing important data like emails, phone numbers etc. This simple php script turns given text to image dynamically.

<?php

header ("Content-type: image/png");

$text='test@example.com';

$string = $text;                                            

$font   = 3;

$width  = ImageFontWidth($font) * strlen($string);

$height = ImageFontHeight($font);

 

$im = @imagecreate ($width,$height);

$background_color = imagecolorallocate ($im, 255, 255, 255); //white background

$text_color = imagecolorallocate ($im, 0, 0,0);//black text

imagestring ($im, $font, 0, 0,  $string, $text_color);

echo imagepng ($im);

?>

Sample Usage:

This example consists two parts,

• index.php which displays contents including user emails
• tx2img.php receives key and outputs email images related to given key

index.php
This index.php stores name & emails in a session variable and sends name as a parameter to txt2img.php

<?php

@session_start();

$_SESSION['images']=array('john'=>'John@sample.com','peter'=>'Peter@example.com');

 

echo "This sample illustrates how to convert text into images using php<br><br>";

echo "First Email:<img src='http://localhost/txt2img.php?img=john' /><br>";

echo "Second Email:<img src='http://localhost/txt2img.php?img=peter' />";

?>

txt2img.php
This page receives name as a parameter then outputs related emails as image

<?php

ob_start();

@session_start();

header ("Content-type: image/png");

$text=$_SESSION['images'][$_GET['img']];

if($text=='')

 exit;

 

$string = $text;                                            

$font   = 3;

$width  = ImageFontWidth($font) * strlen($string);

$height = ImageFontHeight($font);

 

$im = @imagecreate ($width,$height);

$background_color = imagecolorallocate ($im, 255, 255, 255); //white background

$text_color = imagecolorallocate ($im, 0, 0,0);//black text

imagestring ($im, $font, 0, 0,  $string, $text_color);

echo imagepng ($im);

?>

When you run index.php in browser, you’ll get output similar to the one given below: