Showing posts with label PHP Image. Show all posts
Showing posts with label PHP Image. Show all posts

Thursday, April 7, 2016

Determine Image Dimension based on Font size in PHP


Working with images and text, we need to set image size based on font size is very useful for dynamic image processing. like CAPTCHA and text images. if you looking for PHP script to set image size based on font size here is the solution for you.

<?php


if($_GET['fontsize']!="" and is_numeric($_GET['fontsize']))
$size=$_GET['fontsize'];
else
$size=20;


define("F_SIZE", $size);
define("F_ANGLE", 0);
define("F_FONT", "verdana.ttf");


$text = "W3 Lessons";

$Leading=0;
$W=0;
$H=0;
$X=0;
$Y=0;

$_bx = imagettfbbox(F_SIZE, F_ANGLE, F_FONT, $text);
$s = preg_split("/\n]+/", $text);  // Array of lines
$nL = count($s);  // Number of lines

$W = ($W==0)?abs($_bx[2]-$_bx[0]):$W;
$H = ($H==0)?abs($_bx[5]-$_bx[3])+2+($nL>1?($nL*$Leading):0):$H;

$W*=1.05;
$H*=1.5;

$img = @imagecreate($W+8, $H) or die("Cannot Initialize new GD image stream");

$white = imagecolorallocate($img, 255,255,255);
$txtColor = imagecolorallocate($img, 29,56,131);

// Adjust padding right:
$W+=8;
$bgwhite = imagecolorallocatealpha($img,238,238,238,0);
imagefilledrectangle($img, 0, 0,$W,$H, $bgwhite);

$alpha = "".range("a", "z");
$alpha = $alpha.strtoupper($alpha).range(0, 9);

// Use the string to determine the height of a line
$_b = imageTTFBbox(F_SIZE, F_ANGLE, F_FONT, $alpha);
$_H = abs($_b[5]-$_b[3]);
$__H = 0;

// Use the string to determine the width of a line
$_b = imagettfbbox(F_SIZE, F_ANGLE, F_FONT, $text);
$_W = abs($_b[2]-$_b[0]);

// Final width and height
$_X = abs($W/2)-abs($_W/2);
$__H += $_H;

imagettftext($img, F_SIZE, F_ANGLE, $_X, $__H, $txtColor, F_FONT, $text);

header("Content-Type: image/png");
imagepng($img);
imagedestroy($img);
// END EMAIL IMAGE  
exit();
?>

Thursday, October 11, 2012

Protect email address in web content.


While building web content we may need to include email address. In this case spam bots are may access our web page and collect email address inside our web content. based on this email address extracting script.

The only way to protect Email address inside the content is convert all email address into image.

Here is the solution to convert email address into dynamic text images


email-to-image.php

<?php

define("F_SIZE", 10);
define("F_ANGLE", 0);
define("F_FONT", "verdana.ttf");

$text = base64_decode(base64_decode($_GET['id']));

$Leading=0;
$W=0;
$H=0;
$X=0;
$Y=0;
$_bx = imagettfbbox(F_SIZE, F_ANGLE, F_FONT, $text);
$s = preg_split("/\n]+/", $text);  // Array of lines
$nL = count($s);  // Number of lines

$W = ($W==0)?abs($_bx[2]-$_bx[0]):$W;
$H = ($H==0)?abs($_bx[5]-$_bx[3])+2+($nL>1?($nL*$Leading):0):$H;

$img = @imagecreate($W+8, $H) or die("Cannot Initialize new GD image stream");

$white = imagecolorallocate($img, 255,255,255);
$txtColor = imagecolorallocate($img, 255,50,0);

// Adjust padding right:
$W+=8;
$bgwhite = imagecolorallocatealpha($img,238,238,238,0);
imagefilledrectangle($img, 0, 0,$W,$H, $bgwhite);

$alpha = "".range("a", "z");
$alpha = $alpha.strtoupper($alpha).range(0, 9);

// Use the string to determine the height of a line
$_b = imageTTFBbox(F_SIZE, F_ANGLE, F_FONT, $alpha);
$_H = abs($_b[5]-$_b[3]);
$__H = 0;

// Use the string to determine the width of a line
$_b = imagettfbbox(F_SIZE, F_ANGLE, F_FONT, $text);
$_W = abs($_b[2]-$_b[0]);

// Final width and height
$_X = abs($W/2)-abs($_W/2);
$__H += $_H;

imagettftext($img, F_SIZE, F_ANGLE, $_X, $__H, $txtColor, F_FONT, $text);

header("Content-Type: image/png");
imagepng($img);
imagedestroy($img);
// END EMAIL IMAGE  
exit();
?>

index.php

<?php
if(isset($_POST['content']))
{
$content=$_POST['content'];
// Keep line breaks inside textarea
$content=preg_replace("/[\n]/", '<br />', $content);
// Find All email ids inside content
preg_match_all('/([\w-\.]+)@((?:[\w]+\.)+)([a-zA-Z]{2,4})/',$content,$emails);

// Replace as image every email address
foreach($emails[0] as $email)
$content=str_replace($email,'<img src="email-to-image.php?id='.base64_encode(base64_encode($email)).'">',$content);
}
?>
<!DOCTYPE>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Untitled Document</title>
<style type="text/css">
body,td,th {
 font-family: Verdana, Geneva, sans-serif;
 font-size: 12px;
 color: #000;
}
body {
 margin-left: 5px;
 margin-top: 5px;
 margin-right: 5px;
 margin-bottom: 5px;
 margin:0 auto;
 width:750px;
}

textarea { width:750px; font-size:15px; font-family:Verdana, Geneva, sans-serif;}

#content
{
 font-size:13px;
 padding:10px;
 background:#EEE;
 border:1px solid #CCC; 
}

#content img
{

 position:relative;
 margin-bottom:-3px;
}

</style>
</head>
<body>

<br>
<br>
<h1>Protect Email Address inside web content</h1>
<form action="" method="post">
<textarea cols="70" rows="10" name="content">
content mixed with any email address. that email address text will be converted into as image. for example we have info@example.com mail in this text area it will be return as image after the compilation. any no of occurrence will automatically replaced as image 

For Example:
Contact
admin@example.com

Technical
tech@example.com
</textarea>
<br /><br />

<input type="submit" value="Compile" name="submit" /><br />
<br />

</form>

<div id="content">
<?php echo @$content; ?>
</div>
</body>
</html>


Download This Script     Live Demo     Download Script

Thursday, September 27, 2012

Resize Image when upload PHP


Upload and Resize Image dynamically. when upload a image file in PHP is very use full to manage images on web development.
here is my solution how to upload image after resize  uploaded image in PHP


Upload Rezied Image on Server

Upload and Resize Image PHP

Upload-Resize.php (full Source)

<?php

if(isset($_POST['upload_image']))
{
 
 // Check Valid Image 
 if(preg_match("/(jpg)|(png)|(gif)/i",$_FILES['image_file']['name']))
 {
   
 // Load uploaded image from $_FILES
 // encode type in form need to set | encode="multipart/form-data" |
 $filename = $_FILES['image_file']['tmp_name'];
 
 // Prepare target image name with path on server appending with timestamp
 $target_file_name = "Image".time();
 $target_file_name = "images/$target_file_name";  
 
 $image_info = getimagesize($filename);
 $image_type = $image_info[2];


  
  if( $image_type == IMAGETYPE_JPEG ) {
   $image = imagecreatefromjpeg($filename);
   $target_file_name.=".jpg"; // append file extention based on image type;
  } elseif( $image_type == IMAGETYPE_GIF ) {
   $image = imagecreatefromgif($filename);
   $target_file_name.=".gif";  
  } elseif( $image_type == IMAGETYPE_PNG ) {
   $target_file_name.=".png";  
   $image = imagecreatefrompng($filename);
  }
  
  // get width height of upload image file
  $height = imagesy($image);
  $width = imagesx($image);
 
  // SET THE SIZE OF TARGET IMAGE i use 250 x 250
  $target_width = 250;
  $target_height = 250;
  // Create a Empty Image Canvas
  $new_image = imagecreatetruecolor($target_width,$target_height);
  imagealphablending($new_image, true);
  imagesavealpha($new_image, true);
  
  // Set Canvas Background Color / Transparent as per your requirement
  // I prefer to go with Transparent
  
  // Make canvas Filled Background Color
  $white = imagecolorallocate($new_image, 255, 255, 255);
  $grey = imagecolorallocate($new_image, 128, 128, 128);
  $black = imagecolorallocate($new_image, 0, 0, 0);
  imagefilledrectangle($new_image, 0, 0, $target_width,$target_height, $grey); 
  
  // Make Canvas Transparent
  $trans_colour = imagecolorallocatealpha($new_image, 0, 0, 0, 127);
  imagefill($new_image, 0, 0, $trans_colour);
 
  // Copy Source Image to Canvas
  imagecopyresampled($new_image, $image, 0, 0, 0, 0, $target_width,$target_height,$width, $height);
  $image = $new_image;
  

  
  // Save image based on file type;
  if( $image_type == IMAGETYPE_JPEG ) {
   imagejpeg($image,$filename,100);
  } elseif( $image_type == IMAGETYPE_GIF ) {
   imagegif($image,$target_file_name);         
  } elseif( $image_type == IMAGETYPE_PNG ) {
   imagepng($image,$target_file_name);
  }   
   chmod($target_file_name,777);
  
  $response = '<span style="color:#060">Image Successfully Uploaded!</span>';
 }else
 {
  $response = '<span style="color:#FF0000;">Select a Valid (JPG,GIF,PNG) Images</span>';
 }
}

?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Upload and Resize Image</title>
<style type="text/css">
body,td,th {
 font-size: 14px;
 font-family: Verdana, Geneva, sans-serif;
}
body {
 margin-left: 10px;
 margin-right: 10px;
}
</style>
</head>
<body>

<div style="padding:10px;">
<?php echo @$response; ?>
</div>
<form action="" method="post" enctype="multipart/form-data">
    <fieldset>
    <legend>Upload Image</legend>
    
        <input name="image_file" type="file" id="image_file" />
        
        <input name="upload_image" type="submit" id="upload_image" value="Upload" />
        
    </fieldset>
</form>
</body>
</html>



Tuesday, September 25, 2012

Add Image watermark Over another Image PHP


Adding watermark is very help full. Add Image Watermark with original image is also help to protect our images here is my solution to Add Water Mark in PHP

Use the following Images

original_image.jpg




watermark_image.png

water mark image

Prepare an transparent image with exact same size of the original image. Transparent PNG with Text by overlap original image to create a final watermark added image.

<?php
// Original Image Path
$image= "images/original_image.jpg";  

header("Content-type: image/jpeg");
header("Content-Disposition: inline; filename=$image");

switch (TRUE) {
case stristr($image,'jpg') :
$photoImage = ImageCreateFromJPEG("$image");
break;
case stristr($image,'gif') :
$photoImage = ImageCreateFromGIF("$image");
break;
case stristr($image,'png') :
$photoImage = ImageCreateFromPNG("$image");
break;
}

ImageAlphaBlending($photoImage, true); 

// Same Size PNG Watermark Image with Transparency
$logoImage = ImageCreateFromPNG("watermark_image.png"); 
$logoW = ImageSX($logoImage); 
$logoH = ImageSY($logoImage); 

// were you see the two 1's this is the offset from the top-left hand corner!
ImageCopy($photoImage, $logoImage, 1, 1, 0, 0, $logoW, $logoH); 

imagejpeg($photoImage);
// if you want to save add the following line
imagejpeg($photoImage,"images/final.jpg");

ImageDestroy($photoImage); 
ImageDestroy($logoImage); 

?>



Saturday, September 22, 2012

Water mark in PHP


Processing with image in PHP, Adding watermark is very help full. Add Image Watermark with original image is also help to protect our images here is my solution to Add Water Mark in PHP


Prepare an transparent image with exact same size of the original image. Transparent PNG with Text by overlap original image to create a final watermark added image.

<?php
// Original Image Path
$image= "images/original_image.jpg";  

header("Content-type: image/jpeg");
header("Content-Disposition: inline; filename=$image");

switch (TRUE) {
case stristr($image,'jpg') :
$photoImage = ImageCreateFromJPEG("$image");
break;
case stristr($image,'gif') :
$photoImage = ImageCreateFromGIF("$image");
break;
case stristr($image,'png') :
$photoImage = ImageCreateFromPNG("$image");
break;
}

ImageAlphaBlending($photoImage, true); 

// Same Size PNG Watermark Image with Transparency
$logoImage = ImageCreateFromPNG("watermark_image.png"); 
$logoW = ImageSX($logoImage); 
$logoH = ImageSY($logoImage); 

// were you see the two 1's this is the offset from the top-left hand corner!
ImageCopy($photoImage, $logoImage, 1, 1, 0, 0, $logoW, $logoH); 

imagejpeg($photoImage);
// if you want to save add the following line
imagejpeg($photoImage,"images/final.jpg");

ImageDestroy($photoImage); 
ImageDestroy($logoImage); 

?>




Monday, October 10, 2011

HTML code for an image

Embedded HTML Code for an Image is an advanced technique for Modern Web. Standard HTML Images are map with <IMG> tag using src attribute src attribute is to be an URL of an Image.

Traditional Image Tag Example:
<img src="pathof-image.jpg" />

HTML code for an image
In Modern Image tag  Image Soruce Placed It self with in the SRC using Image Tag Data URI Scheme

Click Here to View how to create  Image Tag Data URI Scheme

Following PHP Function we can build the HTML Code for an Image.


<?php
// Funtion to prepare Data URI:
// @ parm: Image filepath, Image Size
// reutn : data_uri string
function thumbnail_data_uri($filename,$width=0,$height=0) 
{
 
 // Get Image Header Type
      $image_info = getimagesize($filename);
      $image_type = $image_info[2];

 // Check the Size is Specified
 if($width!=0 and $height!=0)
 {
      if( $image_type == IMAGETYPE_JPEG ) {
         $image = imagecreatefromjpeg($filename);
      } elseif( $image_type == IMAGETYPE_GIF ) {
         $image = imagecreatefromgif($filename);
      } elseif( $image_type == IMAGETYPE_PNG ) {
         $image = imagecreatefrompng($filename);
   imagealphablending($image, true);

      } 

 $new_image = imagecreatetruecolor($width, $height);
 imagealphablending($new_image, false);
 imagesavealpha($new_image, true);     
      imagecopyresampled($new_image, $image, 0, 0, 0, 0, $width, $height, imagesx($image),imagesy($image));
      $image = $new_image; 
   
 ob_start();
      if( $image_type == IMAGETYPE_JPEG ) {
         imagejpeg($image);
      } elseif( $image_type == IMAGETYPE_GIF ) {
         imagegif($image);         
      } elseif( $image_type == IMAGETYPE_PNG ) {
         imagepng($image);
      } 
 $content=ob_get_clean();   
   
   
 }else
 $content=file_get_contents($filename,true);
 
 
 
 $base64 = base64_encode($content); 
 return "data:$image_type;base64,$base64";
}

?>