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gd_info

(PHP 4 >= 4.3.0, PHP 5, PHP 7)

gd_infoRetrieve information about the currently installed GD library

Description

gd_info ( ) : array

Gets information about the version and capabilities of the installed GD library.

Return Values

Returns an associative array.

Elements of array returned by gd_info()
Attribute Meaning
GD Version string value describing the installed libgd version.
FreeType Support bool value. TRUE if FreeType Support is installed.
FreeType Linkage string value describing the way in which FreeType was linked. Expected values are: 'with freetype', 'with TTF library', and 'with unknown library'. This element will only be defined if FreeType Support evaluated to TRUE.
GIF Read Support bool value. TRUE if support for reading GIF images is included.
GIF Create Support bool value. TRUE if support for creating GIF images is included.
JPEG Support bool value. TRUE if JPEG support is included.
PNG Support bool value. TRUE if PNG support is included.
WBMP Support bool value. TRUE if WBMP support is included.
XBM Support bool value. TRUE if XBM support is included.
WebP Support bool value. TRUE if WebP support is included.

Examples

Example #1 Using gd_info()

<?php
var_dump
(gd_info());
?>

The above example will output something similar to:

array(10) {
  ["GD Version"]=>
  string(24) "bundled (2.1.0 compatible)"
  ["FreeType Support"]=>
  bool(false)
  ["GIF Read Support"]=>
  bool(true)
  ["GIF Create Support"]=>
  bool(false)
  ["JPEG Support"]=>
  bool(false)
  ["PNG Support"]=>
  bool(true)
  ["WBMP Support"]=>
  bool(true)
  ["XBM Support"]=>
  bool(false)
  ["WebP Support"]=>
  bool(false)
}

See Also

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User Contributed Notes 1 note

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yohami dot com - zerodj at hotmail dot com
16 years ago
A cool resize / cropping script for creating thumbnails using mogrify

IMAGETEST.PHP

<?php

include 'mogrify.php';

// variables from flash (my website uses flash and php)
$picture="sample.jpg";
$fixedwidth=300;
$fixedheight=240;
//

cropimage($picture,$fixedwidth,$fixedheight,$mogrify);

?>

MOGRIFY.PHP

<?php
// walking the path
$mogrify="C:/apache/Imagik/mogrify.exe";

// ---------------------------------------- crop function

function cropimage($picture,$fixedwidth,$fixedheight,$mogrify) {

   
// GET IMG
   
$img = imagecreatefromjpeg($picture);
   
$width= imagesx($img);
   
$height= imagesy($img);
   
// CROP WIDTH
   
if($width!=$fixedwidth){
       
$ratio =$fixedwidth/$width;
       
$NewHeight=round($height*$ratio);
       
$NewWidth=round($width*$ratio);
       
exec( $mogrify." -resize ".$NewWidth."x".$NewHeight."! $picture");
       
exec( $mogrify." -crop ".$fixedwidth."x".$fixedheight."+0+0 $picture");
       
// REFRESH
       
$img = imagecreatefromjpeg($picture);
       
$width= imagesx($img);
       
$height= imagesy($img);
    }
   
// CROP HEIGHT
   
if($height!=$fixedheight){
       
$ratio =$fixedheight/$height;
       
$NewHeight=round($height*$ratio);
       
$NewWidth=round($width*$ratio);
       
exec( $mogrify." -resize ".$NewWidth."x".$NewHeight."! $picture");
       
exec( $mogrify." -crop ".$fixedwidth."x".$fixedheight."+0+0 $picture");
    }
   
//
   
ImageDestroy($img);
}

?>

yeah!
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