gd_info

(PHP 4 >= 4.3.0, PHP 5)

gd_info — Obtém informações sobre a biblioteca GD instalada atualmente

Descrição

array gd_info ( void )

Obtém informação sobre a versão e as capacidades da biblioteca GD instalada.

Valor Retornado

Retorna um array associativo.

Elementos da matriz retornados por **gd_info()**
Atributo	Significado
GD Version	Valor string descrevendo a versão da libgd instalada.
Freetype Support	Valor boolean. `TRUE` se o suporte Freetype esta instalado.
Freetype Linkage	Valor string dewscrevendo a maneira que Freetype foi linkado. Os valores esperados são: 'with freetype', 'with TTF library', e 'with unknown library'. Este elemento será definido apenas se Freetype Support for `TRUE`.
T1Lib Support	Valor boolean. `TRUE` se o suporte a T1Lib estiver incluso.
GIF Read Support	Valor boolean. `TRUE` se o suporte para ler imagens GIF estiver incluso.
GIF Create Support	Valor boolean. `TRUE` se o suporte para criação de imagens GIF estiver incluso.
JPG Support	Valor boolean. `TRUE` se o suporte a JPG estiver incluso.
PNG Support	Valor boolean. `TRUE` se o suporte a PNG estiver incluso.
WBMP Support	Valor boolean. `TRUE` se o suporte a WBMP estiver incluso.
XBM Support	Valor boolean. `TRUE` se o suporte a XBM estiver incluso.

Exemplos

Exemplo #1 Usando a gd_info()


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

O exemplo acima irá imprimir algo similar a:

array(9) {
  ["GD Version"]=>
  string(24) "bundled (2.0 compatible)"
  ["FreeType Support"]=>
  bool(false)
  ["T1Lib Support"]=>
  bool(false)
  ["GIF Read Support"]=>
  bool(true)
  ["GIF Create Support"]=>
  bool(false)
  ["JPG Support"]=>
  bool(false)
  ["PNG Support"]=>
  bool(true)
  ["WBMP Support"]=>
  bool(true)
  ["XBM Support"]=>
  bool(false)
}

Veja Também

imagepng() - Envia uma imagem PNG para o browser ou para um arquivo
imagejpeg() - Envia a imagem para o borwser ou arquivo
imagegif() - Envia uma imagem para o browser ou arquivo
imagewbmp() - Envia uma imagem para o browser ou arquivo
imagetypes() - Retorna os tipos de imagens suportados por esta instalação do PHP

getimagesize

Funções da GD

Last updated: Fri, 06 Nov 2009

add a note User Contributed Notes
gd_info

baumbach at kabece dot com
03-Nov-2006 02:58


@ thorerik dot lie at gmail dot com



<?

$array=gd_info ();

foreach ($array as $key=>$val) {

  

  if ($val===true) {

    $val="Enabled";

  }



  if ($val===false) {

    $val="Disabled";

  }



  echo "$key: $val <br />\n";



}

?>



does the same thing (SCNR)

Michael Z
28-Sep-2005 05:40


An easy way to get the numeric value for the GD Version :

$Version = ereg_replace('[[:alpha:][:space:]()]+', '', $GDArray['GD Version']);

Hagan Fox
03-May-2005 09:35


This function safely determines the GD version, even on PHP versions earlier than 4.3 that lack the gd_info() function.  Use it to avoid having your script halt with a fatal error if you try to use a TrueColor function and the GD version isn't 2.0 or later.



You can optionally specify a version, but if you specify version 2 it might be overridden.  Once the version number is determined it's retained to speed future calls.



<?php

/**

* Get which version of GD is installed, if any.

*

* Returns the version (1 or 2) of the GD extension.

*/

function gdVersion($user_ver = 0)

{

    if (! extension_loaded('gd')) { return; }

    static $gd_ver = 0;

    // Just accept the specified setting if it's 1.

    if ($user_ver == 1) { $gd_ver = 1; return 1; }

    // Use the static variable if function was called previously.

    if ($user_ver !=2 && $gd_ver > 0 ) { return $gd_ver; }

    // Use the gd_info() function if possible.

    if (function_exists('gd_info')) {

        $ver_info = gd_info();

        preg_match('/\d/', $ver_info['GD Version'], $match);

        $gd_ver = $match[0];

        return $match[0];

    }

    // If phpinfo() is disabled use a specified / fail-safe choice...

    if (preg_match('/phpinfo/', ini_get('disable_functions'))) {

        if ($user_ver == 2) {

            $gd_ver = 2;

            return 2;

        } else {

            $gd_ver = 1;

            return 1;

        }

    }

    // ...otherwise use phpinfo().

    ob_start();

    phpinfo(8);

    $info = ob_get_contents();

    ob_end_clean();

    $info = stristr($info, 'gd version');

    preg_match('/\d/', $info, $match);

    $gd_ver = $match[0];

    return $match[0];

} // End gdVersion()



// Usage:



if ($gdv = gdVersion()) {

    if ($gdv >=2) {

        echo 'TrueColor functions may be used.';

    } else {

        echo 'GD version is 1.  Avoid the TrueColor functions.';

    }

} else {

    echo "The GD extension isn't loaded.";

}

?>



The function only detects the GD version, but you could determine GD capabilities in a similar manner.

phpnet at furp dot com
08-Dec-2004 04:59


I updated the function below to include the GD Version info and any other string fields. The function only showed the bool values before.



// Retrieve information about the currently installed GD library

function describeGDdyn() {

  echo "\n<ul><li>GD support: ";

  if(function_exists("gd_info")){

   echo "<font color=\"#00ff00\">yes</font>";

   $info = gd_info();

   $keys = array_keys($info);

   for($i=0; $i<count($keys); $i++) {

        if(is_bool($info[$keys[$i]])) echo "</li>\n<li>" . $keys[$i] .": " . yesNo($info[$keys[$i]]);

        else echo "</li>\n<li>" . $keys[$i] .": " . $info[$keys[$i]];

   }

  } else { echo "<font color=\"#ff0000\">no</font>"; }

  echo "</li></ul>";

}



function yesNo($bool){

  if($bool) return "<font color=\"#00ff00\"> yes</font>";

  else return "<font color=\"#ff0000\"> no</font>";

}

yohami dot com - zerodj at hotmail dot com
14-Jan-2004 01:09


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!

johnschaefer at gmx dot de
09-Apr-2003 10:25


this is a replacement for this function.

you can also use this function in php >= 4.3.



the handling is the same as the gd_info function (array gd_info(void))



<?php

$code = 'function gd_info() {

        $array = Array(

                       "GD Version" => "",

                       "FreeType Support" => 0,

                       "FreeType Support" => 0,

                       "FreeType Linkage" => "",

                       "T1Lib Support" => 0,

                       "GIF Read Support" => 0,

                       "GIF Create Support" => 0,

                       "JPG Support" => 0,

                       "PNG Support" => 0,

                       "WBMP Support" => 0,

                       "XBM Support" => 0

                      );

        $gif_support = 0;



        ob_start();

        eval("phpinfo();");

        $info = ob_get_contents();

        ob_end_clean();

      

        foreach(explode("\n", $info) as $line) {

            if(strpos($line, "GD Version")!==false)

                $array["GD Version"] = trim(str_replace("GD Version", "", strip_tags($line)));

            if(strpos($line, "FreeType Support")!==false)

                $array["FreeType Support"] = trim(str_replace("FreeType Support", "", strip_tags($line)));

            if(strpos($line, "FreeType Linkage")!==false)

                $array["FreeType Linkage"] = trim(str_replace("FreeType Linkage", "", strip_tags($line)));

            if(strpos($line, "T1Lib Support")!==false)

                $array["T1Lib Support"] = trim(str_replace("T1Lib Support", "", strip_tags($line)));

            if(strpos($line, "GIF Read Support")!==false)

                $array["GIF Read Support"] = trim(str_replace("GIF Read Support", "", strip_tags($line)));

            if(strpos($line, "GIF Create Support")!==false)

                $array["GIF Create Support"] = trim(str_replace("GIF Create Support", "", strip_tags($line)));

            if(strpos($line, "GIF Support")!==false)

                $gif_support = trim(str_replace("GIF Support", "", strip_tags($line)));

            if(strpos($line, "JPG Support")!==false)

                $array["JPG Support"] = trim(str_replace("JPG Support", "", strip_tags($line)));

            if(strpos($line, "PNG Support")!==false)

                $array["PNG Support"] = trim(str_replace("PNG Support", "", strip_tags($line)));

            if(strpos($line, "WBMP Support")!==false)

                $array["WBMP Support"] = trim(str_replace("WBMP Support", "", strip_tags($line)));

            if(strpos($line, "XBM Support")!==false)

                $array["XBM Support"] = trim(str_replace("XBM Support", "", strip_tags($line)));

        }

        

        if($gif_support==="enabled") {

            $array["GIF Read Support"]   = 1;

            $array["GIF Create Support"] = 1;

        }



        if($array["FreeType Support"]==="enabled"){

            $array["FreeType Support"] = 1;    }

 

        if($array["T1Lib Support"]==="enabled")

            $array["T1Lib Support"] = 1;     

       

        if($array["GIF Read Support"]==="enabled"){

            $array["GIF Read Support"] = 1;    }

 

        if($array["GIF Create Support"]==="enabled")

            $array["GIF Create Support"] = 1;     



        if($array["JPG Support"]==="enabled")

            $array["JPG Support"] = 1;

            

        if($array["PNG Support"]==="enabled")

            $array["PNG Support"] = 1;

            

        if($array["WBMP Support"]==="enabled")

            $array["WBMP Support"] = 1;

            

        if($array["XBM Support"]==="enabled")

            $array["XBM Support"] = 1;

        

        return $array;

    }';



if(!function_exists("gd_info")) eval($code);

?>

add a note

getimagesize

Funções da GD

Last updated: Fri, 06 Nov 2009