gd_info

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

gd_info — Retrieve information about the currently installed GD library

설명

array gd_info ( void )

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

반환값

Returns an associative array.

Elements of array returned by **gd_info()**
Attribute	Meaning
GD Version	string value describing the installed libgd version.
FreeType Support	boolean 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`.
T1Lib Support	boolean value. `TRUE` if T1Lib support is included.
GIF Read Support	boolean value. `TRUE` if support for reading GIF images is included.
GIF Create Support	boolean value. `TRUE` if support for creating GIF images is included.
JPEG Support	boolean value. `TRUE` if JPEG support is included.
PNG Support	boolean value. `TRUE` if PNG support is included.
WBMP Support	boolean value. `TRUE` if WBMP support is included.
XBM Support	boolean value. `TRUE` if XBM support is included.
WebP Support	boolean value. `TRUE` if WebP support is included.

Note:
Previous to PHP 5.3.0, the JPEG Support attribute was named JPG Support.

예제

Example #1 Using gd_info()


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

위 예제의 출력 예시:

array(10) {
  ["GD Version"]=>
  string(24) "bundled (2.1.0 compatible)"
  ["FreeType Support"]=>
  bool(false)
  ["T1Lib 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)
}

변경점

버전	설명
5.6.12	WebP Support added.
5.3.0	JPG Support attribute renamed to JPEG Support.

참고

imagepng() - Output a PNG image to either the browser or a file
imagejpeg() - 브라우저나 파일로 출력 이미지
imagegif() - 브라우저나 파일로 출력 이미지
imagewbmp() - 브라우저나 파일로 출력 이미지
imagewebp() - Output a WebP image to browser or file
imagetypes() - Return the image types supported by this PHP build

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User Contributed Notes 1 note

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yohami dot com - zerodj at hotmail dot com ¶

20 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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