PHP Unconference Europe 2015

imagetypes

(PHP 4 >= 4.0.2, PHP 5)

imagetypesDevolver los tipos de imagen soportados por la versión actual de PHP

Descripción

int imagetypes ( void )

Devuelve los tipos de imagen soportados por la instalación actual de PHP.

Valores devueltos

Devuelve un campo de bit correspondiente a los formatos de imagen soportados por la versión de GD vinculada a PHP. Los siguietes bits son devueltos, IMG_GIF | IMG_JPG | IMG_PNG | IMG_WBMP | IMG_XPM.

Ejemplos

Ejemplo #1 Comprobar el soporte para PNG

<?php
if (imagetypes() & IMG_PNG) {
    echo 
"El soporte para PNG está habilitado";
}
?>

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User Contributed Notes 3 notes

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2
ThunderCrew
7 years ago
Im not a smart man but this seemd to be the simplest code and it worked.
Its at the very top of this directory.

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

Returned image info and more.

array(11) { ["GD Version"]=> string(27) "bundled (2.0.28 compatible)" ["FreeType Support"]=> bool(true) ["FreeType Linkage"]=> string(13) "with freetype" ["T1Lib Support"]=> bool(false) ["GIF Read Support"]=> bool(true) ["GIF Create Support"]=> bool(true) ["JPG Support"]=> bool(true) ["PNG Support"]=> bool(true) ["WBMP Support"]=> bool(true) ["XBM Support"]=> bool(true) ["JIS-mapped Japanese Font Support"]=> bool(false) }
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0
enyo
10 years ago
Why not use this function?

<?php
function getSupportedImageTypes() {
   
$aSupportedTypes = array();

   
$aPossibleImageTypeBits = array(
       
IMG_GIF=>'GIF',
       
IMG_JPG=>'JPG',
       
IMG_PNG=>'PNG',
       
IMG_WBMP=>'WBMP'
   
);

    foreach (
$aPossibleImageTypeBits as $iImageTypeBits => $sImageTypeString) {
        if (
imagetypes() & $iImageTypeBits) {
           
$aSupportedTypes[] = $sImageTypeString;
        }
    }

    return
$aSupportedTypes;
}
?>
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0
jaldinger (at) consulturdorado (dot) com
11 years ago
Please note that if only "GIF Read Support" is enabled, the
IMG_GIF bit will not be returned (at least on my system:
PHP 4.3.0/RH Linux 7.2).

To work around this issue, and also the issue that there is no
function that can tell me what image format a GD resource ID
refers to, I use the following switch statement to map the exif
IMAGETYPE_* constants to the GD IMG_* constants:

switch (exif_imagetype($file['tmp_name'])) {
    case IMAGETYPE_GIF:
        $image_type = IMG_GIF;
        break;
    case IMAGETYPE_JPEG:
        $image_type = IMG_JPG;
        break;
    case IMAGETYPE_PNG:
        $image_type = IMG_PNG;
        break;
    case IMAGETYPE_WBMP:
        $image_type = IMG_WBMP;
        break;
     default:
        $image_type = 0;
        break;
}

store this value together with the image data in a database
and later use the following IF statement to see if I can work
with that image (create a thumbnail, etc...)

if ($image_type & (imagetypes() | IMG_GIF)) {
    return $this->createJpegThumbailFromString($data, 46, 27);
} else {
    return file_get_contents($_SERVER['DOCUMENT_ROOT'] .
        '/gfx/no-thumbnail.jpg');
}

HTH anybody...

Joerg.
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