imagecreatefromstring(3) [php man page]

IMAGECREATEFROMSTRING(3)						 1						  IMAGECREATEFROMSTRING(3)

imagecreatefromstring - Create a new image from the image stream in the string

SYNOPSIS

       resource imagecreatefromstring (string  $image)

DESCRIPTION

       imagecreatefromstring(3)  returns  an image identifier representing the image obtained from the given $image. These types will be automati-
       cally detected if your build of PHP supports them: JPEG, PNG, GIF, WBMP, and GD2.

PARAMETERS

	      o $image
		- A string containing the image data.

RETURN VALUES

	An image resource will be returned on success.	FALSE is returned if the image type is unsupported, the data is not in a  recognised  for-
       mat, or the image is corrupt and cannot be loaded.

EXAMPLES

       Example #1

	      imagecreatefromstring(3) example

	      <?php
	      $data = 'iVBORw0KGgoAAAANSUhEUgAAABwAAAASCAMAAAB/2U7WAAAABl'
		     . 'BMVEUAAAD///+l2Z/dAAAASUlEQVR4XqWQUQoAIAxC2/0vXZDr'
		     . 'EX4IJTRkb7lobNUStXsB0jIXIAMSsQnWlsV+wULF4Avk9fLq2r'
		     . '8a5HSE35Q3eO2XP1A1wQkZSgETvDtKdQAAAABJRU5ErkJggg==';
	      $data = base64_decode($data);

	      $im = imagecreatefromstring($data);
	      if ($im !== false) {
		  header('Content-Type: image/png');
		  imagepng($im);
		  imagedestroy($im);
	      }
	      else {
		  echo 'An error occurred.';
	      }
	      ?>

	      The above example will output something similar to:[NOT DISPLAYABLE MEDIA]Output of example : imagecreatefromstring()

SEE ALSO

       imagecreatefromjpeg(3), imagecreatefrompng(3), imagecreatefromgif(3), imagecreatetruecolor(3).

PHP Documentation Group 												  IMAGECREATEFROMSTRING(3)

IMAGEGIF(3)								 1							       IMAGEGIF(3)

imagegif - Output image to browser or file

SYNOPSIS

       bool imagegif (resource	$image, [string  $filename])

DESCRIPTION

       imagegif(3)  creates the GIF file in filename from the image $image. The $image argument is the return from the imagecreate(3) or imagecre-
       atefrom* function.

	The image format will be GIF87a unless the image has been made transparent with imagecolortransparent(3), in which case the  image  format
       will be GIF89a.

PARAMETERS

	      o $
		image -An image resource, returned by one of the image creation functions, such as imagecreatetruecolor(3).

	      o $filename
		-The path to save the file to. If not set or NULL, the raw image stream will be outputted directly.

RETURN VALUES

	Returns TRUE on success or FALSE on failure.

EXAMPLES

       Example #1

	      Outputting an image using imagegif(3)

	      <?php
	      // Create a new image instance
	      $im = imagecreatetruecolor(100, 100);

	      // Make the background white
	      imagefilledrectangle($im, 0, 0, 99, 99, 0xFFFFFF);

	      // Draw a text string on the image
	      imagestring($im, 3, 40, 20, 'GD Library', 0xFFBA00);

	      // Output the image to browser
	      header('Content-Type: image/gif');

	      imagegif($im);
	      imagedestroy($im);
	      ?>

       Example #2

	      Converting a PNG image to GIF using imagegif(3)

	      <?php

	      // Load the PNG
	      $png = imagecreatefrompng('./php.png');

	      // Save the image as a GIF
	      imagegif($png, './php.gif');

	      // Free from memory
	      imagedestroy($png);

	      // We're done
	      echo 'Converted PNG image to GIF with success!';
	      ?>

NOTES

       Note

	      GIF support was removed from the GD library in Version 1.6, and added back in Version 2.0.28. This function is not available between
	      these versions. For more information, see the GD Project site.

	       The following code snippet allows you to write more portable PHP applications by auto-detecting the type of  GD	support  which	is
	      available. Replace the sequence header ("Content-Type: image/gif"); imagegif ($im); by the more flexible sequence:

	      <?php
	      // Create a new image instance
	      $im = imagecreatetruecolor(100, 100);

	      // Do some image operations here

	      // Handle output
	      if(function_exists('imagegif'))
	      {
		  // For GIF
		  header('Content-Type: image/gif');

		  imagegif($im);
	      }
	      elseif(function_exists('imagejpeg'))
	      {
		  // For JPEG
		  header('Content-Type: image/jpeg');

		  imagejpeg($im, NULL, 100);
	      }
	      elseif(function_exists('imagepng'))
	      {
		  // For PNG
		  header('Content-Type: image/png');

		  imagepng($im);
	      }
	      elseif(function_exists('imagewbmp'))
	      {
		  // For WBMP
		  header('Content-Type: image/vnd.wap.wbmp');

		  imagewbmp($im);
	      }
	      else
	      {
		  imagedestroy($im);

		  die('No image support in this PHP server');
	      }

	      // If image support was found for one of these
	      // formats, then free it from memory
	      if($im)
	      {
		  imagedestroy($im);
	      }
	      ?>

       Note

	       As of PHP 4.0.2 you can use the function imagetypes(3) in place of function_exists(3) for checking the presence of the various sup-
	      ported image formats:

	      <?php
	      if(imagetypes() & IMG_GIF)
	      {
		  header('Content-Type: image/gif');
		  imagegif($im);
	      }
	      elseif(imagetypes() & IMG_JPG)
	      {
		  /* ... etc. */
	      }
	      ?>

SEE ALSO

       imagepng(3), imagewbmp(3), imagejpeg(3), imagetypes(3).

PHP Documentation Group 													       IMAGEGIF(3)